Home / 81,505.92-122,252.16-57,715.20

Finding the Fourth Proportional to 81,505.92, 122,252.16 and 57,715.20

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Solution

The fourth proportional to 81,505.92, 122,252.16 and 57,715.20 is: 86,568.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,505.92 : 122,252.16 = 57,715.20 : x
  2. Step 2: Convert to fraction form
    81,505.92/122,252.16 = 57,715.20/x
  3. Step 3: Cross multiply
    81,505.92x = 122,252.16 × 57,715.20
  4. Step 4: Simplify right side
    81,505.92x = 7,055,807,864.83
  5. Step 5: Solve for x
    x = 7,055,807,864.83/81,505.92
  6. Step 6: Final answer
    x = 86,568.04

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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.