Home / 80,872.20-121,275.90-28,254.60

Finding the Fourth Proportional to 80,872.20, 121,275.90 and 28,254.60

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Solution

The fourth proportional to 80,872.20, 121,275.90 and 28,254.60 is: 42,370.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,872.20 : 121,275.90 = 28,254.60 : x
  2. Step 2: Convert to fraction form
    80,872.20/121,275.90 = 28,254.60/x
  3. Step 3: Cross multiply
    80,872.20x = 121,275.90 × 28,254.60
  4. Step 4: Simplify right side
    80,872.20x = 3,426,602,044.14
  5. Step 5: Solve for x
    x = 3,426,602,044.14/80,872.20
  6. Step 6: Final answer
    x = 42,370.58

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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.