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Finding the Fourth Proportional to 159,703.20, 220,279.91 and 129,489.80

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Solution

The fourth proportional to 159,703.20, 220,279.91 and 129,489.80 is: 178,606.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,703.20 : 220,279.91 = 129,489.80 : x
  2. Step 2: Convert to fraction form
    159,703.20/220,279.91 = 129,489.80/x
  3. Step 3: Cross multiply
    159,703.20x = 220,279.91 × 129,489.80
  4. Step 4: Simplify right side
    159,703.20x = 28,523,999,741.07
  5. Step 5: Solve for x
    x = 28,523,999,741.07/159,703.20
  6. Step 6: Final answer
    x = 178,606.31

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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.