Home / 80,740.20-121,111.02-28,149.60

Finding the Fourth Proportional to 80,740.20, 121,111.02 and 28,149.60

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Solution

The fourth proportional to 80,740.20, 121,111.02 and 28,149.60 is: 42,224.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,740.20 : 121,111.02 = 28,149.60 : x
  2. Step 2: Convert to fraction form
    80,740.20/121,111.02 = 28,149.60/x
  3. Step 3: Cross multiply
    80,740.20x = 121,111.02 × 28,149.60
  4. Step 4: Simplify right side
    80,740.20x = 3,409,226,768.59
  5. Step 5: Solve for x
    x = 3,409,226,768.59/80,740.20
  6. Step 6: Final answer
    x = 42,224.65

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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.