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Finding the Fourth Proportional to 159,586.61, 220,239.38 and 87,966.47

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Solution

The fourth proportional to 159,586.61, 220,239.38 and 87,966.47 is: 121,399.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,586.61 : 220,239.38 = 87,966.47 : x
  2. Step 2: Convert to fraction form
    159,586.61/220,239.38 = 87,966.47/x
  3. Step 3: Cross multiply
    159,586.61x = 220,239.38 × 87,966.47
  4. Step 4: Simplify right side
    159,586.61x = 19,373,680,373.76
  5. Step 5: Solve for x
    x = 19,373,680,373.76/159,586.61
  6. Step 6: Final answer
    x = 121,399.16

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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.