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Finding the Fourth Proportional to 71,818.81, 107,627.38 and 56,759.72

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Solution

The fourth proportional to 71,818.81, 107,627.38 and 56,759.72 is: 85,059.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,818.81 : 107,627.38 = 56,759.72 : x
  2. Step 2: Convert to fraction form
    71,818.81/107,627.38 = 56,759.72/x
  3. Step 3: Cross multiply
    71,818.81x = 107,627.38 × 56,759.72
  4. Step 4: Simplify right side
    71,818.81x = 6,108,899,273.10
  5. Step 5: Solve for x
    x = 6,108,899,273.10/71,818.81
  6. Step 6: Final answer
    x = 85,059.88

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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.