Home / 80,703.25-121,055.48-28,112.65

Finding the Fourth Proportional to 80,703.25, 121,055.48 and 28,112.65

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Solution

The fourth proportional to 80,703.25, 121,055.48 and 28,112.65 is: 42,169.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,703.25 : 121,055.48 = 28,112.65 : x
  2. Step 2: Convert to fraction form
    80,703.25/121,055.48 = 28,112.65/x
  3. Step 3: Cross multiply
    80,703.25x = 121,055.48 × 28,112.65
  4. Step 4: Simplify right side
    80,703.25x = 3,403,190,339.82
  5. Step 5: Solve for x
    x = 3,403,190,339.82/80,703.25
  6. Step 6: Final answer
    x = 42,169.19

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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.