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Finding the Fourth Proportional to 140,358.80, 210,538.20 and 70,212.80

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Solution

The fourth proportional to 140,358.80, 210,538.20 and 70,212.80 is: 105,319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,358.80 : 210,538.20 = 70,212.80 : x
  2. Step 2: Convert to fraction form
    140,358.80/210,538.20 = 70,212.80/x
  3. Step 3: Cross multiply
    140,358.80x = 210,538.20 × 70,212.80
  4. Step 4: Simplify right side
    140,358.80x = 14,782,476,528.96
  5. Step 5: Solve for x
    x = 14,782,476,528.96/140,358.80
  6. Step 6: Final answer
    x = 105,319.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.