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Finding the Fourth Proportional to 83,309.40, 124,998.12 and 43,901.28

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Solution

The fourth proportional to 83,309.40, 124,998.12 and 43,901.28 is: 65,869.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,309.40 : 124,998.12 = 43,901.28 : x
  2. Step 2: Convert to fraction form
    83,309.40/124,998.12 = 43,901.28/x
  3. Step 3: Cross multiply
    83,309.40x = 124,998.12 × 43,901.28
  4. Step 4: Simplify right side
    83,309.40x = 5,487,577,465.59
  5. Step 5: Solve for x
    x = 5,487,577,465.59/83,309.40
  6. Step 6: Final answer
    x = 65,869.85

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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.