Home / 152,145.12-209,961.60-91,718.88

Finding the Fourth Proportional to 152,145.12, 209,961.60 and 91,718.88

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Solution

The fourth proportional to 152,145.12, 209,961.60 and 91,718.88 is: 126,572.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,145.12 : 209,961.60 = 91,718.88 : x
  2. Step 2: Convert to fraction form
    152,145.12/209,961.60 = 91,718.88/x
  3. Step 3: Cross multiply
    152,145.12x = 209,961.60 × 91,718.88
  4. Step 4: Simplify right side
    152,145.12x = 19,257,442,795.01
  5. Step 5: Solve for x
    x = 19,257,442,795.01/152,145.12
  6. Step 6: Final answer
    x = 126,572.86

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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.