Home / 138,515.20-207,772.80-59,718.40

Finding the Fourth Proportional to 138,515.20, 207,772.80 and 59,718.40

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Solution

The fourth proportional to 138,515.20, 207,772.80 and 59,718.40 is: 89,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,515.20 : 207,772.80 = 59,718.40 : x
  2. Step 2: Convert to fraction form
    138,515.20/207,772.80 = 59,718.40/x
  3. Step 3: Cross multiply
    138,515.20x = 207,772.80 × 59,718.40
  4. Step 4: Simplify right side
    138,515.20x = 12,407,859,179.52
  5. Step 5: Solve for x
    x = 12,407,859,179.52/138,515.20
  6. Step 6: Final answer
    x = 89,577.60

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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.