Home / 81,031.10-121,704.19-66,049.20

Finding the Fourth Proportional to 81,031.10, 121,704.19 and 66,049.20

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Solution

The fourth proportional to 81,031.10, 121,704.19 and 66,049.20 is: 99,202.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,031.10 : 121,704.19 = 66,049.20 : x
  2. Step 2: Convert to fraction form
    81,031.10/121,704.19 = 66,049.20/x
  3. Step 3: Cross multiply
    81,031.10x = 121,704.19 × 66,049.20
  4. Step 4: Simplify right side
    81,031.10x = 8,038,464,221.03
  5. Step 5: Solve for x
    x = 8,038,464,221.03/81,031.10
  6. Step 6: Final answer
    x = 99,202.22

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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.