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Finding the Fourth Proportional to 56,664.92, 78,229.62 and 43,129.88

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Solution

The fourth proportional to 56,664.92, 78,229.62 and 43,129.88 is: 59,543.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,664.92 : 78,229.62 = 43,129.88 : x
  2. Step 2: Convert to fraction form
    56,664.92/78,229.62 = 43,129.88/x
  3. Step 3: Cross multiply
    56,664.92x = 78,229.62 × 43,129.88
  4. Step 4: Simplify right side
    56,664.92x = 3,374,034,123.05
  5. Step 5: Solve for x
    x = 3,374,034,123.05/56,664.92
  6. Step 6: Final answer
    x = 59,543.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.