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Finding the Fourth Proportional to 66,989.76, 92,446.48 and 38,694.80

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Solution

The fourth proportional to 66,989.76, 92,446.48 and 38,694.80 is: 53,399.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,989.76 : 92,446.48 = 38,694.80 : x
  2. Step 2: Convert to fraction form
    66,989.76/92,446.48 = 38,694.80/x
  3. Step 3: Cross multiply
    66,989.76x = 92,446.48 × 38,694.80
  4. Step 4: Simplify right side
    66,989.76x = 3,577,198,054.30
  5. Step 5: Solve for x
    x = 3,577,198,054.30/66,989.76
  6. Step 6: Final answer
    x = 53,399.18

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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.