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Finding the Fourth Proportional to 99,691.01, 137,574.67 and 54,368.62

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Solution

The fourth proportional to 99,691.01, 137,574.67 and 54,368.62 is: 75,029.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,691.01 : 137,574.67 = 54,368.62 : x
  2. Step 2: Convert to fraction form
    99,691.01/137,574.67 = 54,368.62/x
  3. Step 3: Cross multiply
    99,691.01x = 137,574.67 × 54,368.62
  4. Step 4: Simplify right side
    99,691.01x = 7,479,744,954.86
  5. Step 5: Solve for x
    x = 7,479,744,954.86/99,691.01
  6. Step 6: Final answer
    x = 75,029.28

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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.