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Finding the Fourth Proportional to 109,468.96, 151,064.16 and 61,721.92

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Solution

The fourth proportional to 109,468.96, 151,064.16 and 61,721.92 is: 85,174.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,468.96 : 151,064.16 = 61,721.92 : x
  2. Step 2: Convert to fraction form
    109,468.96/151,064.16 = 61,721.92/x
  3. Step 3: Cross multiply
    109,468.96x = 151,064.16 × 61,721.92
  4. Step 4: Simplify right side
    109,468.96x = 9,323,969,998.39
  5. Step 5: Solve for x
    x = 9,323,969,998.39/109,468.96
  6. Step 6: Final answer
    x = 85,174.56

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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.