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Finding the Fourth Proportional to 66,470.72, 91,729.88 and 36,256.69

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Solution

The fourth proportional to 66,470.72, 91,729.88 and 36,256.69 is: 50,034.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,470.72 : 91,729.88 = 36,256.69 : x
  2. Step 2: Convert to fraction form
    66,470.72/91,729.88 = 36,256.69/x
  3. Step 3: Cross multiply
    66,470.72x = 91,729.88 × 36,256.69
  4. Step 4: Simplify right side
    66,470.72x = 3,325,822,142.86
  5. Step 5: Solve for x
    x = 3,325,822,142.86/66,470.72
  6. Step 6: Final answer
    x = 50,034.39

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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.