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Finding the Fourth Proportional to 159,608.68, 220,261.52 and 87,991.32

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Solution

The fourth proportional to 159,608.68, 220,261.52 and 87,991.32 is: 121,428.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,608.68 : 220,261.52 = 87,991.32 : x
  2. Step 2: Convert to fraction form
    159,608.68/220,261.52 = 87,991.32/x
  3. Step 3: Cross multiply
    159,608.68x = 220,261.52 × 87,991.32
  4. Step 4: Simplify right side
    159,608.68x = 19,381,101,890.01
  5. Step 5: Solve for x
    x = 19,381,101,890.01/159,608.68
  6. Step 6: Final answer
    x = 121,428.87

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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.