Home / 80,787.60-121,165.20-30,833.28

Finding the Fourth Proportional to 80,787.60, 121,165.20 and 30,833.28

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Solution

The fourth proportional to 80,787.60, 121,165.20 and 30,833.28 is: 46,243.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.60 : 121,165.20 = 30,833.28 : x
  2. Step 2: Convert to fraction form
    80,787.60/121,165.20 = 30,833.28/x
  3. Step 3: Cross multiply
    80,787.60x = 121,165.20 × 30,833.28
  4. Step 4: Simplify right side
    80,787.60x = 3,735,920,537.86
  5. Step 5: Solve for x
    x = 3,735,920,537.86/80,787.60
  6. Step 6: Final answer
    x = 46,243.74

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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.