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Finding the Fourth Proportional to 391,392.74, 587,162.94 and 125,081.75

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Solution

The fourth proportional to 391,392.74, 587,162.94 and 125,081.75 is: 187,646.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,392.74 : 587,162.94 = 125,081.75 : x
  2. Step 2: Convert to fraction form
    391,392.74/587,162.94 = 125,081.75/x
  3. Step 3: Cross multiply
    391,392.74x = 587,162.94 × 125,081.75
  4. Step 4: Simplify right side
    391,392.74x = 73,443,368,070.35
  5. Step 5: Solve for x
    x = 73,443,368,070.35/391,392.74
  6. Step 6: Final answer
    x = 187,646.22

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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.