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Finding the Fourth Proportional to 74,552.40, 111,755.70 and 66,679.20

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Solution

The fourth proportional to 74,552.40, 111,755.70 and 66,679.20 is: 99,953.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,552.40 : 111,755.70 = 66,679.20 : x
  2. Step 2: Convert to fraction form
    74,552.40/111,755.70 = 66,679.20/x
  3. Step 3: Cross multiply
    74,552.40x = 111,755.70 × 66,679.20
  4. Step 4: Simplify right side
    74,552.40x = 7,451,780,671.44
  5. Step 5: Solve for x
    x = 7,451,780,671.44/74,552.40
  6. Step 6: Final answer
    x = 99,953.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.