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Finding the Fourth Proportional to 66,639.44, 91,965.98 and 38,354.24

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Solution

The fourth proportional to 66,639.44, 91,965.98 and 38,354.24 is: 52,930.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,639.44 : 91,965.98 = 38,354.24 : x
  2. Step 2: Convert to fraction form
    66,639.44/91,965.98 = 38,354.24/x
  3. Step 3: Cross multiply
    66,639.44x = 91,965.98 × 38,354.24
  4. Step 4: Simplify right side
    66,639.44x = 3,527,285,268.76
  5. Step 5: Solve for x
    x = 3,527,285,268.76/66,639.44
  6. Step 6: Final answer
    x = 52,930.90

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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.