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Finding the Fourth Proportional to 68,502.40, 102,907.20 and 66,659.20

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Solution

The fourth proportional to 68,502.40, 102,907.20 and 66,659.20 is: 100,138.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,502.40 : 102,907.20 = 66,659.20 : x
  2. Step 2: Convert to fraction form
    68,502.40/102,907.20 = 66,659.20/x
  3. Step 3: Cross multiply
    68,502.40x = 102,907.20 × 66,659.20
  4. Step 4: Simplify right side
    68,502.40x = 6,859,711,626.24
  5. Step 5: Solve for x
    x = 6,859,711,626.24/68,502.40
  6. Step 6: Final answer
    x = 100,138.27

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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.