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Finding the Fourth Proportional to 99,464.60, 137,262.89 and 54,143.88

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Solution

The fourth proportional to 99,464.60, 137,262.89 and 54,143.88 is: 74,719.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,464.60 : 137,262.89 = 54,143.88 : x
  2. Step 2: Convert to fraction form
    99,464.60/137,262.89 = 54,143.88/x
  3. Step 3: Cross multiply
    99,464.60x = 137,262.89 × 54,143.88
  4. Step 4: Simplify right side
    99,464.60x = 7,431,945,444.61
  5. Step 5: Solve for x
    x = 7,431,945,444.61/99,464.60
  6. Step 6: Final answer
    x = 74,719.50

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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.