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Finding the Fourth Proportional to 67,649.40, 101,279.70 and 41,405.40

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Solution

The fourth proportional to 67,649.40, 101,279.70 and 41,405.40 is: 61,989.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,649.40 : 101,279.70 = 41,405.40 : x
  2. Step 2: Convert to fraction form
    67,649.40/101,279.70 = 41,405.40/x
  3. Step 3: Cross multiply
    67,649.40x = 101,279.70 × 41,405.40
  4. Step 4: Simplify right side
    67,649.40x = 4,193,526,490.38
  5. Step 5: Solve for x
    x = 4,193,526,490.38/67,649.40
  6. Step 6: Final answer
    x = 61,989.12

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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.