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Finding the Fourth Proportional to 148,618.87, 205,087.54 and 84,960.78

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Solution

The fourth proportional to 148,618.87, 205,087.54 and 84,960.78 is: 117,242.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,618.87 : 205,087.54 = 84,960.78 : x
  2. Step 2: Convert to fraction form
    148,618.87/205,087.54 = 84,960.78/x
  3. Step 3: Cross multiply
    148,618.87x = 205,087.54 × 84,960.78
  4. Step 4: Simplify right side
    148,618.87x = 17,424,397,366.68
  5. Step 5: Solve for x
    x = 17,424,397,366.68/148,618.87
  6. Step 6: Final answer
    x = 117,242.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.