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Finding the Fourth Proportional to 66,425.80, 91,480.98 and 64,974.28

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Solution

The fourth proportional to 66,425.80, 91,480.98 and 64,974.28 is: 89,481.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,425.80 : 91,480.98 = 64,974.28 : x
  2. Step 2: Convert to fraction form
    66,425.80/91,480.98 = 64,974.28/x
  3. Step 3: Cross multiply
    66,425.80x = 91,480.98 × 64,974.28
  4. Step 4: Simplify right side
    66,425.80x = 5,943,910,809.19
  5. Step 5: Solve for x
    x = 5,943,910,809.19/66,425.80
  6. Step 6: Final answer
    x = 89,481.96

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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.