Home / 80,969.90-121,454.85-72,440.60

Finding the Fourth Proportional to 80,969.90, 121,454.85 and 72,440.60

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Solution

The fourth proportional to 80,969.90, 121,454.85 and 72,440.60 is: 108,660.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,969.90 : 121,454.85 = 72,440.60 : x
  2. Step 2: Convert to fraction form
    80,969.90/121,454.85 = 72,440.60/x
  3. Step 3: Cross multiply
    80,969.90x = 121,454.85 × 72,440.60
  4. Step 4: Simplify right side
    80,969.90x = 8,798,262,206.91
  5. Step 5: Solve for x
    x = 8,798,262,206.91/80,969.90
  6. Step 6: Final answer
    x = 108,660.90

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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.