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Finding the Fourth Proportional to 83,457.92, 124,559.92 and 72,163.28

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Solution

The fourth proportional to 83,457.92, 124,559.92 and 72,163.28 is: 107,702.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,457.92 : 124,559.92 = 72,163.28 : x
  2. Step 2: Convert to fraction form
    83,457.92/124,559.92 = 72,163.28/x
  3. Step 3: Cross multiply
    83,457.92x = 124,559.92 × 72,163.28
  4. Step 4: Simplify right side
    83,457.92x = 8,988,652,383.74
  5. Step 5: Solve for x
    x = 8,988,652,383.74/83,457.92
  6. Step 6: Final answer
    x = 107,702.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.