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Finding the Fourth Proportional to 109,988.72, 151,784.92 and 59,687.76

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Solution

The fourth proportional to 109,988.72, 151,784.92 and 59,687.76 is: 82,369.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,988.72 : 151,784.92 = 59,687.76 : x
  2. Step 2: Convert to fraction form
    109,988.72/151,784.92 = 59,687.76/x
  3. Step 3: Cross multiply
    109,988.72x = 151,784.92 × 59,687.76
  4. Step 4: Simplify right side
    109,988.72x = 9,059,701,876.58
  5. Step 5: Solve for x
    x = 9,059,701,876.58/109,988.72
  6. Step 6: Final answer
    x = 82,369.37

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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.