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Finding the Fourth Proportional to 261,137.90, 391,765.89 and 92,658.41

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Solution

The fourth proportional to 261,137.90, 391,765.89 and 92,658.41 is: 139,008.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,137.90 : 391,765.89 = 92,658.41 : x
  2. Step 2: Convert to fraction form
    261,137.90/391,765.89 = 92,658.41/x
  3. Step 3: Cross multiply
    261,137.90x = 391,765.89 × 92,658.41
  4. Step 4: Simplify right side
    261,137.90x = 36,300,402,954.95
  5. Step 5: Solve for x
    x = 36,300,402,954.95/261,137.90
  6. Step 6: Final answer
    x = 139,008.56

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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.