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Finding the Fourth Proportional to 86,893.70, 130,340.55 and 68,231.30

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Solution

The fourth proportional to 86,893.70, 130,340.55 and 68,231.30 is: 102,346.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,893.70 : 130,340.55 = 68,231.30 : x
  2. Step 2: Convert to fraction form
    86,893.70/130,340.55 = 68,231.30/x
  3. Step 3: Cross multiply
    86,893.70x = 130,340.55 × 68,231.30
  4. Step 4: Simplify right side
    86,893.70x = 8,893,305,169.22
  5. Step 5: Solve for x
    x = 8,893,305,169.22/86,893.70
  6. Step 6: Final answer
    x = 102,346.95

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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.