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Finding the Fourth Proportional to 159,851.90, 239,461.95 and 81,022.70

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Solution

The fourth proportional to 159,851.90, 239,461.95 and 81,022.70 is: 121,373.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,851.90 : 239,461.95 = 81,022.70 : x
  2. Step 2: Convert to fraction form
    159,851.90/239,461.95 = 81,022.70/x
  3. Step 3: Cross multiply
    159,851.90x = 239,461.95 × 81,022.70
  4. Step 4: Simplify right side
    159,851.90x = 19,401,853,736.27
  5. Step 5: Solve for x
    x = 19,401,853,736.27/159,851.90
  6. Step 6: Final answer
    x = 121,373.93

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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.