Home / 143,062.40-197,422.26-78,531.68

Finding the Fourth Proportional to 143,062.40, 197,422.26 and 78,531.68

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Solution

The fourth proportional to 143,062.40, 197,422.26 and 78,531.68 is: 108,371.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,062.40 : 197,422.26 = 78,531.68 : x
  2. Step 2: Convert to fraction form
    143,062.40/197,422.26 = 78,531.68/x
  3. Step 3: Cross multiply
    143,062.40x = 197,422.26 × 78,531.68
  4. Step 4: Simplify right side
    143,062.40x = 15,503,901,747.20
  5. Step 5: Solve for x
    x = 15,503,901,747.20/143,062.40
  6. Step 6: Final answer
    x = 108,371.60

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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.