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Finding the Fourth Proportional to 66,427.78, 91,668.50 and 36,213.70

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Solution

The fourth proportional to 66,427.78, 91,668.50 and 36,213.70 is: 49,973.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,427.78 : 91,668.50 = 36,213.70 : x
  2. Step 2: Convert to fraction form
    66,427.78/91,668.50 = 36,213.70/x
  3. Step 3: Cross multiply
    66,427.78x = 91,668.50 × 36,213.70
  4. Step 4: Simplify right side
    66,427.78x = 3,319,655,558.45
  5. Step 5: Solve for x
    x = 3,319,655,558.45/66,427.78
  6. Step 6: Final answer
    x = 49,973.90

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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.