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Finding the Fourth Proportional to 128,876.40, 193,363.20 and 62,375.40

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Solution

The fourth proportional to 128,876.40, 193,363.20 and 62,375.40 is: 93,586.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,876.40 : 193,363.20 = 62,375.40 : x
  2. Step 2: Convert to fraction form
    128,876.40/193,363.20 = 62,375.40/x
  3. Step 3: Cross multiply
    128,876.40x = 193,363.20 × 62,375.40
  4. Step 4: Simplify right side
    128,876.40x = 12,061,106,945.28
  5. Step 5: Solve for x
    x = 12,061,106,945.28/128,876.40
  6. Step 6: Final answer
    x = 93,586.62

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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.