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Finding the Fourth Proportional to 66,463.53, 91,719 and 38,169.42

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Solution

The fourth proportional to 66,463.53, 91,719 and 38,169.42 is: 52,673.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,463.53 : 91,719 = 38,169.42 : x
  2. Step 2: Convert to fraction form
    66,463.53/91,719 = 38,169.42/x
  3. Step 3: Cross multiply
    66,463.53x = 91,719 × 38,169.42
  4. Step 4: Simplify right side
    66,463.53x = 3,500,861,032.98
  5. Step 5: Solve for x
    x = 3,500,861,032.98/66,463.53
  6. Step 6: Final answer
    x = 52,673.41

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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.