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Finding the Fourth Proportional to 269,079.40, 403,331.10 and 91,421.80

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Solution

The fourth proportional to 269,079.40, 403,331.10 and 91,421.80 is: 137,034.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,079.40 : 403,331.10 = 91,421.80 : x
  2. Step 2: Convert to fraction form
    269,079.40/403,331.10 = 91,421.80/x
  3. Step 3: Cross multiply
    269,079.40x = 403,331.10 × 91,421.80
  4. Step 4: Simplify right side
    269,079.40x = 36,873,255,157.98
  5. Step 5: Solve for x
    x = 36,873,255,157.98/269,079.40
  6. Step 6: Final answer
    x = 137,034.85

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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.