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Finding the Fourth Proportional to 109,673.76, 151,342.52 and 63,729.28

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Solution

The fourth proportional to 109,673.76, 151,342.52 and 63,729.28 is: 87,942.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,673.76 : 151,342.52 = 63,729.28 : x
  2. Step 2: Convert to fraction form
    109,673.76/151,342.52 = 63,729.28/x
  3. Step 3: Cross multiply
    109,673.76x = 151,342.52 × 63,729.28
  4. Step 4: Simplify right side
    109,673.76x = 9,644,949,832.99
  5. Step 5: Solve for x
    x = 9,644,949,832.99/109,673.76
  6. Step 6: Final answer
    x = 87,942.18

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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.