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Finding the Fourth Proportional to 99,331, 137,076.78 and 54,619

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Solution

The fourth proportional to 99,331, 137,076.78 and 54,619 is: 75,374.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,331 : 137,076.78 = 54,619 : x
  2. Step 2: Convert to fraction form
    99,331/137,076.78 = 54,619/x
  3. Step 3: Cross multiply
    99,331x = 137,076.78 × 54,619
  4. Step 4: Simplify right side
    99,331x = 7,486,996,646.82
  5. Step 5: Solve for x
    x = 7,486,996,646.82/99,331
  6. Step 6: Final answer
    x = 75,374.22

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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.