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Finding the Fourth Proportional to 261,227.88, 391,840.11 and 71,673.42

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Solution

The fourth proportional to 261,227.88, 391,840.11 and 71,673.42 is: 107,509.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,227.88 : 391,840.11 = 71,673.42 : x
  2. Step 2: Convert to fraction form
    261,227.88/391,840.11 = 71,673.42/x
  3. Step 3: Cross multiply
    261,227.88x = 391,840.11 × 71,673.42
  4. Step 4: Simplify right side
    261,227.88x = 28,084,520,776.88
  5. Step 5: Solve for x
    x = 28,084,520,776.88/261,227.88
  6. Step 6: Final answer
    x = 107,509.66

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1.5x scale

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.