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Finding the Fourth Proportional to 159,718.80, 239,155.80 and 127,981.20

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Solution

The fourth proportional to 159,718.80, 239,155.80 and 127,981.20 is: 191,633.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,718.80 : 239,155.80 = 127,981.20 : x
  2. Step 2: Convert to fraction form
    159,718.80/239,155.80 = 127,981.20/x
  3. Step 3: Cross multiply
    159,718.80x = 239,155.80 × 127,981.20
  4. Step 4: Simplify right side
    159,718.80x = 30,607,446,270.96
  5. Step 5: Solve for x
    x = 30,607,446,270.96/159,718.80
  6. Step 6: Final answer
    x = 191,633.33

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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.