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Finding the Fourth Proportional to 159,671.54, 220,366.69 and 91,709.78

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Solution

The fourth proportional to 159,671.54, 220,366.69 and 91,709.78 is: 126,570.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,671.54 : 220,366.69 = 91,709.78 : x
  2. Step 2: Convert to fraction form
    159,671.54/220,366.69 = 91,709.78/x
  3. Step 3: Cross multiply
    159,671.54x = 220,366.69 × 91,709.78
  4. Step 4: Simplify right side
    159,671.54x = 20,209,779,328.12
  5. Step 5: Solve for x
    x = 20,209,779,328.12/159,671.54
  6. Step 6: Final answer
    x = 126,570.96

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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.