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Finding the Fourth Proportional to 124,139.50, 171,311.07 and 67,549.90

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Solution

The fourth proportional to 124,139.50, 171,311.07 and 67,549.90 is: 93,218.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,139.50 : 171,311.07 = 67,549.90 : x
  2. Step 2: Convert to fraction form
    124,139.50/171,311.07 = 67,549.90/x
  3. Step 3: Cross multiply
    124,139.50x = 171,311.07 × 67,549.90
  4. Step 4: Simplify right side
    124,139.50x = 11,572,045,647.39
  5. Step 5: Solve for x
    x = 11,572,045,647.39/124,139.50
  6. Step 6: Final answer
    x = 93,218.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.