Home / 86,515.10-129,729.45-39,715.10

Finding the Fourth Proportional to 86,515.10, 129,729.45 and 39,715.10

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Solution

The fourth proportional to 86,515.10, 129,729.45 and 39,715.10 is: 59,552.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,515.10 : 129,729.45 = 39,715.10 : x
  2. Step 2: Convert to fraction form
    86,515.10/129,729.45 = 39,715.10/x
  3. Step 3: Cross multiply
    86,515.10x = 129,729.45 × 39,715.10
  4. Step 4: Simplify right side
    86,515.10x = 5,152,218,079.70
  5. Step 5: Solve for x
    x = 5,152,218,079.70/86,515.10
  6. Step 6: Final answer
    x = 59,552.82

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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.