Home / 80,947.40-121,421.10-72,418.10

Finding the Fourth Proportional to 80,947.40, 121,421.10 and 72,418.10

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Solution

The fourth proportional to 80,947.40, 121,421.10 and 72,418.10 is: 108,627.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,947.40 : 121,421.10 = 72,418.10 : x
  2. Step 2: Convert to fraction form
    80,947.40/121,421.10 = 72,418.10/x
  3. Step 3: Cross multiply
    80,947.40x = 121,421.10 × 72,418.10
  4. Step 4: Simplify right side
    80,947.40x = 8,793,085,361.91
  5. Step 5: Solve for x
    x = 8,793,085,361.91/80,947.40
  6. Step 6: Final answer
    x = 108,627.15

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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.