Home / 201,422,614,631.70-278,088,653,108.88-128,220,148,842.96

Finding the Fourth Proportional to 201,422,614,631.70, 278,088,653,108.88 and 128,220,148,842.96

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Solution

The fourth proportional to 201,422,614,631.70, 278,088,653,108.88 and 128,220,148,842.96 is: 177,023,660,219.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,422,614,631.70 : 278,088,653,108.88 = 128,220,148,842.96 : x
  2. Step 2: Convert to fraction form
    201,422,614,631.70/278,088,653,108.88 = 128,220,148,842.96/x
  3. Step 3: Cross multiply
    201,422,614,631.70x = 278,088,653,108.88 × 128,220,148,842.96
  4. Step 4: Simplify right side
    201,422,614,631.70x = 35,656,568,493,158,868,975,616
  5. Step 5: Solve for x
    x = 35,656,568,493,158,868,975,616/201,422,614,631.70
  6. Step 6: Final answer
    x = 177,023,660,219.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.