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Finding the Fourth Proportional to 159,778.32, 220,501.16 and 91,817.28

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Solution

The fourth proportional to 159,778.32, 220,501.16 and 91,817.28 is: 126,711.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,778.32 : 220,501.16 = 91,817.28 : x
  2. Step 2: Convert to fraction form
    159,778.32/220,501.16 = 91,817.28/x
  3. Step 3: Cross multiply
    159,778.32x = 220,501.16 × 91,817.28
  4. Step 4: Simplify right side
    159,778.32x = 20,245,816,748.04
  5. Step 5: Solve for x
    x = 20,245,816,748.04/159,778.32
  6. Step 6: Final answer
    x = 126,711.91

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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.