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Finding the Fourth Proportional to 106,680, 147,218.40 and 61,993.92

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Solution

The fourth proportional to 106,680, 147,218.40 and 61,993.92 is: 85,551.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,680 : 147,218.40 = 61,993.92 : x
  2. Step 2: Convert to fraction form
    106,680/147,218.40 = 61,993.92/x
  3. Step 3: Cross multiply
    106,680x = 147,218.40 × 61,993.92
  4. Step 4: Simplify right side
    106,680x = 9,126,645,712.13
  5. Step 5: Solve for x
    x = 9,126,645,712.13/106,680
  6. Step 6: Final answer
    x = 85,551.61

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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.