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Finding the Fourth Proportional to 239,373.78, 359,142.69 and 81,712.95

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Solution

The fourth proportional to 239,373.78, 359,142.69 and 81,712.95 is: 122,597.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,373.78 : 359,142.69 = 81,712.95 : x
  2. Step 2: Convert to fraction form
    239,373.78/359,142.69 = 81,712.95/x
  3. Step 3: Cross multiply
    239,373.78x = 359,142.69 × 81,712.95
  4. Step 4: Simplify right side
    239,373.78x = 29,346,608,670.84
  5. Step 5: Solve for x
    x = 29,346,608,670.84/239,373.78
  6. Step 6: Final answer
    x = 122,597.42

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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.