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Finding the Fourth Proportional to 159,939.70, 220,712.54 and 88,318.19

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Solution

The fourth proportional to 159,939.70, 220,712.54 and 88,318.19 is: 121,876.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,939.70 : 220,712.54 = 88,318.19 : x
  2. Step 2: Convert to fraction form
    159,939.70/220,712.54 = 88,318.19/x
  3. Step 3: Cross multiply
    159,939.70x = 220,712.54 × 88,318.19
  4. Step 4: Simplify right side
    159,939.70x = 19,492,932,153.29
  5. Step 5: Solve for x
    x = 19,492,932,153.29/159,939.70
  6. Step 6: Final answer
    x = 121,876.76

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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.