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Finding the Fourth Proportional to 83,715.30, 125,864.55 and 70,884.90

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Solution

The fourth proportional to 83,715.30, 125,864.55 and 70,884.90 is: 106,574.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,715.30 : 125,864.55 = 70,884.90 : x
  2. Step 2: Convert to fraction form
    83,715.30/125,864.55 = 70,884.90/x
  3. Step 3: Cross multiply
    83,715.30x = 125,864.55 × 70,884.90
  4. Step 4: Simplify right side
    83,715.30x = 8,921,896,040.30
  5. Step 5: Solve for x
    x = 8,921,896,040.30/83,715.30
  6. Step 6: Final answer
    x = 106,574.26

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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.