Home / 86,656.20-129,984.30-84,906.60

Finding the Fourth Proportional to 86,656.20, 129,984.30 and 84,906.60

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Solution

The fourth proportional to 86,656.20, 129,984.30 and 84,906.60 is: 127,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,656.20 : 129,984.30 = 84,906.60 : x
  2. Step 2: Convert to fraction form
    86,656.20/129,984.30 = 84,906.60/x
  3. Step 3: Cross multiply
    86,656.20x = 129,984.30 × 84,906.60
  4. Step 4: Simplify right side
    86,656.20x = 11,036,524,966.38
  5. Step 5: Solve for x
    x = 11,036,524,966.38/86,656.20
  6. Step 6: Final answer
    x = 127,359.90

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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.