Home / 80,916.52-121,392.12-28,327.72

Finding the Fourth Proportional to 80,916.52, 121,392.12 and 28,327.72

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Solution

The fourth proportional to 80,916.52, 121,392.12 and 28,327.72 is: 42,497.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,916.52 : 121,392.12 = 28,327.72 : x
  2. Step 2: Convert to fraction form
    80,916.52/121,392.12 = 28,327.72/x
  3. Step 3: Cross multiply
    80,916.52x = 121,392.12 × 28,327.72
  4. Step 4: Simplify right side
    80,916.52x = 3,438,761,985.57
  5. Step 5: Solve for x
    x = 3,438,761,985.57/80,916.52
  6. Step 6: Final answer
    x = 42,497.65

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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.