Home / 80,909.40-121,364.10-28,324.20

Finding the Fourth Proportional to 80,909.40, 121,364.10 and 28,324.20

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Solution

The fourth proportional to 80,909.40, 121,364.10 and 28,324.20 is: 42,486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,909.40 : 121,364.10 = 28,324.20 : x
  2. Step 2: Convert to fraction form
    80,909.40/121,364.10 = 28,324.20/x
  3. Step 3: Cross multiply
    80,909.40x = 121,364.10 × 28,324.20
  4. Step 4: Simplify right side
    80,909.40x = 3,437,541,041.22
  5. Step 5: Solve for x
    x = 3,437,541,041.22/80,909.40
  6. Step 6: Final answer
    x = 42,486.30

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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.