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Finding the Fourth Proportional to 122,483.90, 169,046.26 and 74,764.92

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Solution

The fourth proportional to 122,483.90, 169,046.26 and 74,764.92 is: 103,186.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,483.90 : 169,046.26 = 74,764.92 : x
  2. Step 2: Convert to fraction form
    122,483.90/169,046.26 = 74,764.92/x
  3. Step 3: Cross multiply
    122,483.90x = 169,046.26 × 74,764.92
  4. Step 4: Simplify right side
    122,483.90x = 12,638,730,105.20
  5. Step 5: Solve for x
    x = 12,638,730,105.20/122,483.90
  6. Step 6: Final answer
    x = 103,186.87

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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.