Home / 73,139.20-109,712.40-38,147.20

Finding the Fourth Proportional to 73,139.20, 109,712.40 and 38,147.20

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Solution

The fourth proportional to 73,139.20, 109,712.40 and 38,147.20 is: 57,222.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,139.20 : 109,712.40 = 38,147.20 : x
  2. Step 2: Convert to fraction form
    73,139.20/109,712.40 = 38,147.20/x
  3. Step 3: Cross multiply
    73,139.20x = 109,712.40 × 38,147.20
  4. Step 4: Simplify right side
    73,139.20x = 4,185,220,865.28
  5. Step 5: Solve for x
    x = 4,185,220,865.28/73,139.20
  6. Step 6: Final answer
    x = 57,222.68

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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.