Home / 103,139.12-142,179.90-80,452.64

Finding the Fourth Proportional to 103,139.12, 142,179.90 and 80,452.64

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Solution

The fourth proportional to 103,139.12, 142,179.90 and 80,452.64 is: 110,906.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,139.12 : 142,179.90 = 80,452.64 : x
  2. Step 2: Convert to fraction form
    103,139.12/142,179.90 = 80,452.64/x
  3. Step 3: Cross multiply
    103,139.12x = 142,179.90 × 80,452.64
  4. Step 4: Simplify right side
    103,139.12x = 11,438,748,309.94
  5. Step 5: Solve for x
    x = 11,438,748,309.94/103,139.12
  6. Step 6: Final answer
    x = 110,906.01

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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.