Home / 121,907.20-168,158.38-80,514.45

Finding the Fourth Proportional to 121,907.20, 168,158.38 and 80,514.45

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Solution

The fourth proportional to 121,907.20, 168,158.38 and 80,514.45 is: 111,061.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,907.20 : 168,158.38 = 80,514.45 : x
  2. Step 2: Convert to fraction form
    121,907.20/168,158.38 = 80,514.45/x
  3. Step 3: Cross multiply
    121,907.20x = 168,158.38 × 80,514.45
  4. Step 4: Simplify right side
    121,907.20x = 13,539,178,856.91
  5. Step 5: Solve for x
    x = 13,539,178,856.91/121,907.20
  6. Step 6: Final answer
    x = 111,061.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.