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Finding the Fourth Proportional to 159,687.28, 220,360.98 and 91,657

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Solution

The fourth proportional to 159,687.28, 220,360.98 and 91,657 is: 126,482.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,687.28 : 220,360.98 = 91,657 : x
  2. Step 2: Convert to fraction form
    159,687.28/220,360.98 = 91,657/x
  3. Step 3: Cross multiply
    159,687.28x = 220,360.98 × 91,657
  4. Step 4: Simplify right side
    159,687.28x = 20,197,626,343.86
  5. Step 5: Solve for x
    x = 20,197,626,343.86/159,687.28
  6. Step 6: Final answer
    x = 126,482.37

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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.