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Finding the Fourth Proportional to 107,724.40, 161,202.60 and 68,300.40

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Solution

The fourth proportional to 107,724.40, 161,202.60 and 68,300.40 is: 102,207.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,724.40 : 161,202.60 = 68,300.40 : x
  2. Step 2: Convert to fraction form
    107,724.40/161,202.60 = 68,300.40/x
  3. Step 3: Cross multiply
    107,724.40x = 161,202.60 × 68,300.40
  4. Step 4: Simplify right side
    107,724.40x = 11,010,202,061.04
  5. Step 5: Solve for x
    x = 11,010,202,061.04/107,724.40
  6. Step 6: Final answer
    x = 102,207.13

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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.