Home / 121,091.20-181,636.80-83,766.40

Finding the Fourth Proportional to 121,091.20, 181,636.80 and 83,766.40

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Solution

The fourth proportional to 121,091.20, 181,636.80 and 83,766.40 is: 125,649.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,091.20 : 181,636.80 = 83,766.40 : x
  2. Step 2: Convert to fraction form
    121,091.20/181,636.80 = 83,766.40/x
  3. Step 3: Cross multiply
    121,091.20x = 181,636.80 × 83,766.40
  4. Step 4: Simplify right side
    121,091.20x = 15,215,060,843.52
  5. Step 5: Solve for x
    x = 15,215,060,843.52/121,091.20
  6. Step 6: Final answer
    x = 125,649.60

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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.