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Finding the Fourth Proportional to 239,597.05, 359,438.61 and 81,788.61

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Solution

The fourth proportional to 239,597.05, 359,438.61 and 81,788.61 is: 122,697.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,597.05 : 359,438.61 = 81,788.61 : x
  2. Step 2: Convert to fraction form
    239,597.05/359,438.61 = 81,788.61/x
  3. Step 3: Cross multiply
    239,597.05x = 359,438.61 × 81,788.61
  4. Step 4: Simplify right side
    239,597.05x = 29,397,984,292.23
  5. Step 5: Solve for x
    x = 29,397,984,292.23/239,597.05
  6. Step 6: Final answer
    x = 122,697.61

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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.