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Finding the Fourth Proportional to 66,445.97, 91,717.65 and 39,596.90

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Solution

The fourth proportional to 66,445.97, 91,717.65 and 39,596.90 is: 54,656.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,445.97 : 91,717.65 = 39,596.90 : x
  2. Step 2: Convert to fraction form
    66,445.97/91,717.65 = 39,596.90/x
  3. Step 3: Cross multiply
    66,445.97x = 91,717.65 × 39,596.90
  4. Step 4: Simplify right side
    66,445.97x = 3,631,734,156.70
  5. Step 5: Solve for x
    x = 3,631,734,156.70/66,445.97
  6. Step 6: Final answer
    x = 54,656.96

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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.