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Finding the Fourth Proportional to 66,479.40, 91,743.62 and 38,190.76

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Solution

The fourth proportional to 66,479.40, 91,743.62 and 38,190.76 is: 52,704.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,479.40 : 91,743.62 = 38,190.76 : x
  2. Step 2: Convert to fraction form
    66,479.40/91,743.62 = 38,190.76/x
  3. Step 3: Cross multiply
    66,479.40x = 91,743.62 × 38,190.76
  4. Step 4: Simplify right side
    66,479.40x = 3,503,758,572.95
  5. Step 5: Solve for x
    x = 3,503,758,572.95/66,479.40
  6. Step 6: Final answer
    x = 52,704.43

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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.