Home / 80,789.60-121,168.20-30,835.28

Finding the Fourth Proportional to 80,789.60, 121,168.20 and 30,835.28

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Solution

The fourth proportional to 80,789.60, 121,168.20 and 30,835.28 is: 46,246.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,789.60 : 121,168.20 = 30,835.28 : x
  2. Step 2: Convert to fraction form
    80,789.60/121,168.20 = 30,835.28/x
  3. Step 3: Cross multiply
    80,789.60x = 121,168.20 × 30,835.28
  4. Step 4: Simplify right side
    80,789.60x = 3,736,255,374.10
  5. Step 5: Solve for x
    x = 3,736,255,374.10/80,789.60
  6. Step 6: Final answer
    x = 46,246.74

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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.