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Finding the Fourth Proportional to 159,471.18, 239,355 and 80,641.98

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Solution

The fourth proportional to 159,471.18, 239,355 and 80,641.98 is: 121,037.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,471.18 : 239,355 = 80,641.98 : x
  2. Step 2: Convert to fraction form
    159,471.18/239,355 = 80,641.98/x
  3. Step 3: Cross multiply
    159,471.18x = 239,355 × 80,641.98
  4. Step 4: Simplify right side
    159,471.18x = 19,302,061,122.90
  5. Step 5: Solve for x
    x = 19,302,061,122.90/159,471.18
  6. Step 6: Final answer
    x = 121,037.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.