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Finding the Fourth Proportional to 391,314.71, 586,943.35 and 125,003.72

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Solution

The fourth proportional to 391,314.71, 586,943.35 and 125,003.72 is: 187,496.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,314.71 : 586,943.35 = 125,003.72 : x
  2. Step 2: Convert to fraction form
    391,314.71/586,943.35 = 125,003.72/x
  3. Step 3: Cross multiply
    391,314.71x = 586,943.35 × 125,003.72
  4. Step 4: Simplify right side
    391,314.71x = 73,370,101,836.22
  5. Step 5: Solve for x
    x = 73,370,101,836.22/391,314.71
  6. Step 6: Final answer
    x = 187,496.41

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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.