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Finding the Fourth Proportional to 74,660.20, 111,720.70 and 64,255.70

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Solution

The fourth proportional to 74,660.20, 111,720.70 and 64,255.70 is: 96,151.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,660.20 : 111,720.70 = 64,255.70 : x
  2. Step 2: Convert to fraction form
    74,660.20/111,720.70 = 64,255.70/x
  3. Step 3: Cross multiply
    74,660.20x = 111,720.70 × 64,255.70
  4. Step 4: Simplify right side
    74,660.20x = 7,178,691,782.99
  5. Step 5: Solve for x
    x = 7,178,691,782.99/74,660.20
  6. Step 6: Final answer
    x = 96,151.52

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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.