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Finding the Fourth Proportional to 391,710.42, 587,579.55 and 125,436.33

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Solution

The fourth proportional to 391,710.42, 587,579.55 and 125,436.33 is: 188,158.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,710.42 : 587,579.55 = 125,436.33 : x
  2. Step 2: Convert to fraction form
    391,710.42/587,579.55 = 125,436.33/x
  3. Step 3: Cross multiply
    391,710.42x = 587,579.55 × 125,436.33
  4. Step 4: Simplify right side
    391,710.42x = 73,703,822,335.05
  5. Step 5: Solve for x
    x = 73,703,822,335.05/391,710.42
  6. Step 6: Final answer
    x = 188,158.95

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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.