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Finding the Fourth Proportional to 159,990.17, 240,116.42 and 81,126.95

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Solution

The fourth proportional to 159,990.17, 240,116.42 and 81,126.95 is: 121,756.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,990.17 : 240,116.42 = 81,126.95 : x
  2. Step 2: Convert to fraction form
    159,990.17/240,116.42 = 81,126.95/x
  3. Step 3: Cross multiply
    159,990.17x = 240,116.42 × 81,126.95
  4. Step 4: Simplify right side
    159,990.17x = 19,479,911,801.75
  5. Step 5: Solve for x
    x = 19,479,911,801.75/159,990.17
  6. Step 6: Final answer
    x = 121,756.93

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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.