Home / 86,115.12-129,172.68-23,785.62

Finding the Fourth Proportional to 86,115.12, 129,172.68 and 23,785.62

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Solution

The fourth proportional to 86,115.12, 129,172.68 and 23,785.62 is: 35,678.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,115.12 : 129,172.68 = 23,785.62 : x
  2. Step 2: Convert to fraction form
    86,115.12/129,172.68 = 23,785.62/x
  3. Step 3: Cross multiply
    86,115.12x = 129,172.68 × 23,785.62
  4. Step 4: Simplify right side
    86,115.12x = 3,072,452,280.86
  5. Step 5: Solve for x
    x = 3,072,452,280.86/86,115.12
  6. Step 6: Final answer
    x = 35,678.43

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Similar ratio
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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.