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Finding the Fourth Proportional to 71,818.31, 107,822.85 and 61,355.54

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Solution

The fourth proportional to 71,818.31, 107,822.85 and 61,355.54 is: 92,114.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,818.31 : 107,822.85 = 61,355.54 : x
  2. Step 2: Convert to fraction form
    71,818.31/107,822.85 = 61,355.54/x
  3. Step 3: Cross multiply
    71,818.31x = 107,822.85 × 61,355.54
  4. Step 4: Simplify right side
    71,818.31x = 6,615,529,225.56
  5. Step 5: Solve for x
    x = 6,615,529,225.56/71,818.31
  6. Step 6: Final answer
    x = 92,114.80

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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.