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Finding the Fourth Proportional to 391,167.36, 586,721.88 and 124,956

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Solution

The fourth proportional to 391,167.36, 586,721.88 and 124,956 is: 187,424.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,167.36 : 586,721.88 = 124,956 : x
  2. Step 2: Convert to fraction form
    391,167.36/586,721.88 = 124,956/x
  3. Step 3: Cross multiply
    391,167.36x = 586,721.88 × 124,956
  4. Step 4: Simplify right side
    391,167.36x = 73,314,419,237.28
  5. Step 5: Solve for x
    x = 73,314,419,237.28/391,167.36
  6. Step 6: Final answer
    x = 187,424.69

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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.