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Finding the Fourth Proportional to 99,324.60, 137,109.42 and 65,835.96

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Solution

The fourth proportional to 99,324.60, 137,109.42 and 65,835.96 is: 90,881.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,324.60 : 137,109.42 = 65,835.96 : x
  2. Step 2: Convert to fraction form
    99,324.60/137,109.42 = 65,835.96/x
  3. Step 3: Cross multiply
    99,324.60x = 137,109.42 × 65,835.96
  4. Step 4: Simplify right side
    99,324.60x = 9,026,730,290.74
  5. Step 5: Solve for x
    x = 9,026,730,290.74/99,324.60
  6. Step 6: Final answer
    x = 90,881.11

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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.