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Finding the Fourth Proportional to 66,169.83, 91,304.10 and 39,311.66

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Solution

The fourth proportional to 66,169.83, 91,304.10 and 39,311.66 is: 54,243.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,169.83 : 91,304.10 = 39,311.66 : x
  2. Step 2: Convert to fraction form
    66,169.83/91,304.10 = 39,311.66/x
  3. Step 3: Cross multiply
    66,169.83x = 91,304.10 × 39,311.66
  4. Step 4: Simplify right side
    66,169.83x = 3,589,315,279.29
  5. Step 5: Solve for x
    x = 3,589,315,279.29/66,169.83
  6. Step 6: Final answer
    x = 54,243.99

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1.5x scale

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.