Home / 80,763.22-121,130.25-28,187.74

Finding the Fourth Proportional to 80,763.22, 121,130.25 and 28,187.74

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Solution

The fourth proportional to 80,763.22, 121,130.25 and 28,187.74 is: 42,276.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,763.22 : 121,130.25 = 28,187.74 : x
  2. Step 2: Convert to fraction form
    80,763.22/121,130.25 = 28,187.74/x
  3. Step 3: Cross multiply
    80,763.22x = 121,130.25 × 28,187.74
  4. Step 4: Simplify right side
    80,763.22x = 3,414,387,993.14
  5. Step 5: Solve for x
    x = 3,414,387,993.14/80,763.22
  6. Step 6: Final answer
    x = 42,276.52

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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.