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Finding the Fourth Proportional to 78,722.39, 108,632.78 and 44,726.15

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Solution

The fourth proportional to 78,722.39, 108,632.78 and 44,726.15 is: 61,719.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,722.39 : 108,632.78 = 44,726.15 : x
  2. Step 2: Convert to fraction form
    78,722.39/108,632.78 = 44,726.15/x
  3. Step 3: Cross multiply
    78,722.39x = 108,632.78 × 44,726.15
  4. Step 4: Simplify right side
    78,722.39x = 4,858,726,228.87
  5. Step 5: Solve for x
    x = 4,858,726,228.87/78,722.39
  6. Step 6: Final answer
    x = 61,719.75

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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.