Home / 80,955.11-121,432.65-21,789.23

Finding the Fourth Proportional to 80,955.11, 121,432.65 and 21,789.23

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Solution

The fourth proportional to 80,955.11, 121,432.65 and 21,789.23 is: 32,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,955.11 : 121,432.65 = 21,789.23 : x
  2. Step 2: Convert to fraction form
    80,955.11/121,432.65 = 21,789.23/x
  3. Step 3: Cross multiply
    80,955.11x = 121,432.65 × 21,789.23
  4. Step 4: Simplify right side
    80,955.11x = 2,645,924,243.94
  5. Step 5: Solve for x
    x = 2,645,924,243.94/80,955.11
  6. Step 6: Final answer
    x = 32,683.85

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1.5x scale

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.