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Finding the Fourth Proportional to 261,064.40, 391,404.60 and 83,468.88

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Solution

The fourth proportional to 261,064.40, 391,404.60 and 83,468.88 is: 125,141.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,064.40 : 391,404.60 = 83,468.88 : x
  2. Step 2: Convert to fraction form
    261,064.40/391,404.60 = 83,468.88/x
  3. Step 3: Cross multiply
    261,064.40x = 391,404.60 × 83,468.88
  4. Step 4: Simplify right side
    261,064.40x = 32,670,103,588.85
  5. Step 5: Solve for x
    x = 32,670,103,588.85/261,064.40
  6. Step 6: Final answer
    x = 125,141.93

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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.