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Finding the Fourth Proportional to 159,385.65, 219,961.41 and 91,402.08

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Solution

The fourth proportional to 159,385.65, 219,961.41 and 91,402.08 is: 126,140.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,385.65 : 219,961.41 = 91,402.08 : x
  2. Step 2: Convert to fraction form
    159,385.65/219,961.41 = 91,402.08/x
  3. Step 3: Cross multiply
    159,385.65x = 219,961.41 × 91,402.08
  4. Step 4: Simplify right side
    159,385.65x = 20,104,928,836.92
  5. Step 5: Solve for x
    x = 20,104,928,836.92/159,385.65
  6. Step 6: Final answer
    x = 126,140.15

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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.