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Finding the Fourth Proportional to 67,739.20, 101,608.80 and 66,443.20

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Solution

The fourth proportional to 67,739.20, 101,608.80 and 66,443.20 is: 99,664.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,739.20 : 101,608.80 = 66,443.20 : x
  2. Step 2: Convert to fraction form
    67,739.20/101,608.80 = 66,443.20/x
  3. Step 3: Cross multiply
    67,739.20x = 101,608.80 × 66,443.20
  4. Step 4: Simplify right side
    67,739.20x = 6,751,213,820.16
  5. Step 5: Solve for x
    x = 6,751,213,820.16/67,739.20
  6. Step 6: Final answer
    x = 99,664.80

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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.