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Finding the Fourth Proportional to 83,125.92, 124,687.86 and 56,405.71

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Solution

The fourth proportional to 83,125.92, 124,687.86 and 56,405.71 is: 84,607.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,125.92 : 124,687.86 = 56,405.71 : x
  2. Step 2: Convert to fraction form
    83,125.92/124,687.86 = 56,405.71/x
  3. Step 3: Cross multiply
    83,125.92x = 124,687.86 × 56,405.71
  4. Step 4: Simplify right side
    83,125.92x = 7,033,107,271.68
  5. Step 5: Solve for x
    x = 7,033,107,271.68/83,125.92
  6. Step 6: Final answer
    x = 84,607.87

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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.