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Finding the Fourth Proportional to 218,638.62, 327,957.93 and 125,078.76

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Solution

The fourth proportional to 218,638.62, 327,957.93 and 125,078.76 is: 187,618.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,638.62 : 327,957.93 = 125,078.76 : x
  2. Step 2: Convert to fraction form
    218,638.62/327,957.93 = 125,078.76/x
  3. Step 3: Cross multiply
    218,638.62x = 327,957.93 × 125,078.76
  4. Step 4: Simplify right side
    218,638.62x = 41,020,571,216.57
  5. Step 5: Solve for x
    x = 41,020,571,216.57/218,638.62
  6. Step 6: Final answer
    x = 187,618.14

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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.