Home / 74,708.10-111,738.15-66,867.30

Finding the Fourth Proportional to 74,708.10, 111,738.15 and 66,867.30

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Solution

The fourth proportional to 74,708.10, 111,738.15 and 66,867.30 is: 100,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,708.10 : 111,738.15 = 66,867.30 : x
  2. Step 2: Convert to fraction form
    74,708.10/111,738.15 = 66,867.30/x
  3. Step 3: Cross multiply
    74,708.10x = 111,738.15 × 66,867.30
  4. Step 4: Simplify right side
    74,708.10x = 7,471,628,397.50
  5. Step 5: Solve for x
    x = 7,471,628,397.50/74,708.10
  6. Step 6: Final answer
    x = 100,010.95

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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.