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Finding the Fourth Proportional to 391,131.40, 586,692.14 and 124,888.54

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Solution

The fourth proportional to 391,131.40, 586,692.14 and 124,888.54 is: 187,331.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,131.40 : 586,692.14 = 124,888.54 : x
  2. Step 2: Convert to fraction form
    391,131.40/586,692.14 = 124,888.54/x
  3. Step 3: Cross multiply
    391,131.40x = 586,692.14 × 124,888.54
  4. Step 4: Simplify right side
    391,131.40x = 73,271,124,794.08
  5. Step 5: Solve for x
    x = 73,271,124,794.08/391,131.40
  6. Step 6: Final answer
    x = 187,331.23

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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.