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Finding the Fourth Proportional to 78,863.95, 108,834.11 and 43,054.20

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Solution

The fourth proportional to 78,863.95, 108,834.11 and 43,054.20 is: 59,415.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,863.95 : 108,834.11 = 43,054.20 : x
  2. Step 2: Convert to fraction form
    78,863.95/108,834.11 = 43,054.20/x
  3. Step 3: Cross multiply
    78,863.95x = 108,834.11 × 43,054.20
  4. Step 4: Simplify right side
    78,863.95x = 4,685,765,727.12
  5. Step 5: Solve for x
    x = 4,685,765,727.12/78,863.95
  6. Step 6: Final answer
    x = 59,415.82

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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.