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Finding the Fourth Proportional to 115,363.20, 173,044.80 and 71,270.40

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Solution

The fourth proportional to 115,363.20, 173,044.80 and 71,270.40 is: 106,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,363.20 : 173,044.80 = 71,270.40 : x
  2. Step 2: Convert to fraction form
    115,363.20/173,044.80 = 71,270.40/x
  3. Step 3: Cross multiply
    115,363.20x = 173,044.80 × 71,270.40
  4. Step 4: Simplify right side
    115,363.20x = 12,332,972,113.92
  5. Step 5: Solve for x
    x = 12,332,972,113.92/115,363.20
  6. Step 6: Final answer
    x = 106,905.60

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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.