Home / 170,620.83-256,085.55-86,439.15

Finding the Fourth Proportional to 170,620.83, 256,085.55 and 86,439.15

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Solution

The fourth proportional to 170,620.83, 256,085.55 and 86,439.15 is: 129,736.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,620.83 : 256,085.55 = 86,439.15 : x
  2. Step 2: Convert to fraction form
    170,620.83/256,085.55 = 86,439.15/x
  3. Step 3: Cross multiply
    170,620.83x = 256,085.55 × 86,439.15
  4. Step 4: Simplify right side
    170,620.83x = 22,135,817,269.28
  5. Step 5: Solve for x
    x = 22,135,817,269.28/170,620.83
  6. Step 6: Final answer
    x = 129,736.90

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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.