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Finding the Fourth Proportional to 82,737.80, 123,815.10 and 57,660.20

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Solution

The fourth proportional to 82,737.80, 123,815.10 and 57,660.20 is: 86,287.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,737.80 : 123,815.10 = 57,660.20 : x
  2. Step 2: Convert to fraction form
    82,737.80/123,815.10 = 57,660.20/x
  3. Step 3: Cross multiply
    82,737.80x = 123,815.10 × 57,660.20
  4. Step 4: Simplify right side
    82,737.80x = 7,139,203,429.02
  5. Step 5: Solve for x
    x = 7,139,203,429.02/82,737.80
  6. Step 6: Final answer
    x = 86,287.08

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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.