Home / 80,899.25-121,403.55-28,309.19

Finding the Fourth Proportional to 80,899.25, 121,403.55 and 28,309.19

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Solution

The fourth proportional to 80,899.25, 121,403.55 and 28,309.19 is: 42,482.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,899.25 : 121,403.55 = 28,309.19 : x
  2. Step 2: Convert to fraction form
    80,899.25/121,403.55 = 28,309.19/x
  3. Step 3: Cross multiply
    80,899.25x = 121,403.55 × 28,309.19
  4. Step 4: Simplify right side
    80,899.25x = 3,436,836,573.29
  5. Step 5: Solve for x
    x = 3,436,836,573.29/80,899.25
  6. Step 6: Final answer
    x = 42,482.92

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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.