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Finding the Fourth Proportional to 71,161.68, 98,129.60 and 61,123.44

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Solution

The fourth proportional to 71,161.68, 98,129.60 and 61,123.44 is: 84,287.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,161.68 : 98,129.60 = 61,123.44 : x
  2. Step 2: Convert to fraction form
    71,161.68/98,129.60 = 61,123.44/x
  3. Step 3: Cross multiply
    71,161.68x = 98,129.60 × 61,123.44
  4. Step 4: Simplify right side
    71,161.68x = 5,998,018,717.82
  5. Step 5: Solve for x
    x = 5,998,018,717.82/71,161.68
  6. Step 6: Final answer
    x = 84,287.20

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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.