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Finding the Fourth Proportional to 101,321.28, 151,981.92 and 54,587.52

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Solution

The fourth proportional to 101,321.28, 151,981.92 and 54,587.52 is: 81,881.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,321.28 : 151,981.92 = 54,587.52 : x
  2. Step 2: Convert to fraction form
    101,321.28/151,981.92 = 54,587.52/x
  3. Step 3: Cross multiply
    101,321.28x = 151,981.92 × 54,587.52
  4. Step 4: Simplify right side
    101,321.28x = 8,296,316,097.64
  5. Step 5: Solve for x
    x = 8,296,316,097.64/101,321.28
  6. Step 6: Final answer
    x = 81,881.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.