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Finding the Fourth Proportional to 261,065.92, 391,599.19 and 71,527.90

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Solution

The fourth proportional to 261,065.92, 391,599.19 and 71,527.90 is: 107,291.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,065.92 : 391,599.19 = 71,527.90 : x
  2. Step 2: Convert to fraction form
    261,065.92/391,599.19 = 71,527.90/x
  3. Step 3: Cross multiply
    261,065.92x = 391,599.19 × 71,527.90
  4. Step 4: Simplify right side
    261,065.92x = 28,010,267,702.40
  5. Step 5: Solve for x
    x = 28,010,267,702.40/261,065.92
  6. Step 6: Final answer
    x = 107,291.93

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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.