Home / 80,803.16-121,233.88-28,220.40

Finding the Fourth Proportional to 80,803.16, 121,233.88 and 28,220.40

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Solution

The fourth proportional to 80,803.16, 121,233.88 and 28,220.40 is: 42,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,803.16 : 121,233.88 = 28,220.40 : x
  2. Step 2: Convert to fraction form
    80,803.16/121,233.88 = 28,220.40/x
  3. Step 3: Cross multiply
    80,803.16x = 121,233.88 × 28,220.40
  4. Step 4: Simplify right side
    80,803.16x = 3,421,268,587.15
  5. Step 5: Solve for x
    x = 3,421,268,587.15/80,803.16
  6. Step 6: Final answer
    x = 42,340.78

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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.