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Finding the Fourth Proportional to 261,287.63, 391,932.08 and 71,750.67

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Solution

The fourth proportional to 261,287.63, 391,932.08 and 71,750.67 is: 107,626.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,287.63 : 391,932.08 = 71,750.67 : x
  2. Step 2: Convert to fraction form
    261,287.63/391,932.08 = 71,750.67/x
  3. Step 3: Cross multiply
    261,287.63x = 391,932.08 × 71,750.67
  4. Step 4: Simplify right side
    261,287.63x = 28,121,389,334.49
  5. Step 5: Solve for x
    x = 28,121,389,334.49/261,287.63
  6. Step 6: Final answer
    x = 107,626.18

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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.