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Finding the Fourth Proportional to 86,146.20, 128,927.70 and 75,648.60

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Solution

The fourth proportional to 86,146.20, 128,927.70 and 75,648.60 is: 113,216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,146.20 : 128,927.70 = 75,648.60 : x
  2. Step 2: Convert to fraction form
    86,146.20/128,927.70 = 75,648.60/x
  3. Step 3: Cross multiply
    86,146.20x = 128,927.70 × 75,648.60
  4. Step 4: Simplify right side
    86,146.20x = 9,753,200,006.22
  5. Step 5: Solve for x
    x = 9,753,200,006.22/86,146.20
  6. Step 6: Final answer
    x = 113,216.83

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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.