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Finding the Fourth Proportional to 103,512.30, 155,035.17 and 61,871.82

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Solution

The fourth proportional to 103,512.30, 155,035.17 and 61,871.82 is: 92,668.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,512.30 : 155,035.17 = 61,871.82 : x
  2. Step 2: Convert to fraction form
    103,512.30/155,035.17 = 61,871.82/x
  3. Step 3: Cross multiply
    103,512.30x = 155,035.17 × 61,871.82
  4. Step 4: Simplify right side
    103,512.30x = 9,592,308,131.91
  5. Step 5: Solve for x
    x = 9,592,308,131.91/103,512.30
  6. Step 6: Final answer
    x = 92,668.29

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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.