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Finding the Fourth Proportional to 100,593.72, 151,001.28 and 84,991.68

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Solution

The fourth proportional to 100,593.72, 151,001.28 and 84,991.68 is: 127,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,593.72 : 151,001.28 = 84,991.68 : x
  2. Step 2: Convert to fraction form
    100,593.72/151,001.28 = 84,991.68/x
  3. Step 3: Cross multiply
    100,593.72x = 151,001.28 × 84,991.68
  4. Step 4: Simplify right side
    100,593.72x = 12,833,852,469.35
  5. Step 5: Solve for x
    x = 12,833,852,469.35/100,593.72
  6. Step 6: Final answer
    x = 127,581.05

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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.