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Finding the Fourth Proportional to 66,427.60, 91,668.36 and 36,213.52

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Solution

The fourth proportional to 66,427.60, 91,668.36 and 36,213.52 is: 49,973.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,427.60 : 91,668.36 = 36,213.52 : x
  2. Step 2: Convert to fraction form
    66,427.60/91,668.36 = 36,213.52/x
  3. Step 3: Cross multiply
    66,427.60x = 91,668.36 × 36,213.52
  4. Step 4: Simplify right side
    66,427.60x = 3,319,633,988.23
  5. Step 5: Solve for x
    x = 3,319,633,988.23/66,427.60
  6. Step 6: Final answer
    x = 49,973.72

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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.