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Finding the Fourth Proportional to 99,029, 136,660.74 and 54,317

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Solution

The fourth proportional to 99,029, 136,660.74 and 54,317 is: 74,957.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,029 : 136,660.74 = 54,317 : x
  2. Step 2: Convert to fraction form
    99,029/136,660.74 = 54,317/x
  3. Step 3: Cross multiply
    99,029x = 136,660.74 × 54,317
  4. Step 4: Simplify right side
    99,029x = 7,423,001,414.58
  5. Step 5: Solve for x
    x = 7,423,001,414.58/99,029
  6. Step 6: Final answer
    x = 74,957.85

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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.