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Finding the Fourth Proportional to 239,371.78, 359,139.69 and 81,710.95

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Solution

The fourth proportional to 239,371.78, 359,139.69 and 81,710.95 is: 122,594.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,371.78 : 359,139.69 = 81,710.95 : x
  2. Step 2: Convert to fraction form
    239,371.78/359,139.69 = 81,710.95/x
  3. Step 3: Cross multiply
    239,371.78x = 359,139.69 × 81,710.95
  4. Step 4: Simplify right side
    239,371.78x = 29,345,645,252.61
  5. Step 5: Solve for x
    x = 29,345,645,252.61/239,371.78
  6. Step 6: Final answer
    x = 122,594.42

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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.