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Finding the Fourth Proportional to 261,112.76, 391,627.10 and 71,528.82

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Solution

The fourth proportional to 261,112.76, 391,627.10 and 71,528.82 is: 107,281.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,112.76 : 391,627.10 = 71,528.82 : x
  2. Step 2: Convert to fraction form
    261,112.76/391,627.10 = 71,528.82/x
  3. Step 3: Cross multiply
    261,112.76x = 391,627.10 × 71,528.82
  4. Step 4: Simplify right side
    261,112.76x = 28,012,622,027.24
  5. Step 5: Solve for x
    x = 28,012,622,027.24/261,112.76
  6. Step 6: Final answer
    x = 107,281.70

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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.