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Finding the Fourth Proportional to 159,663.20, 220,349.96 and 91,689.08

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Solution

The fourth proportional to 159,663.20, 220,349.96 and 91,689.08 is: 126,539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,663.20 : 220,349.96 = 91,689.08 : x
  2. Step 2: Convert to fraction form
    159,663.20/220,349.96 = 91,689.08/x
  3. Step 3: Cross multiply
    159,663.20x = 220,349.96 × 91,689.08
  4. Step 4: Simplify right side
    159,663.20x = 20,203,685,110.44
  5. Step 5: Solve for x
    x = 20,203,685,110.44/159,663.20
  6. Step 6: Final answer
    x = 126,539.40

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1.5x scale

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.