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Finding the Fourth Proportional to 78,486.75, 108,287.78 and 44,489.79

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Solution

The fourth proportional to 78,486.75, 108,287.78 and 44,489.79 is: 61,382.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,486.75 : 108,287.78 = 44,489.79 : x
  2. Step 2: Convert to fraction form
    78,486.75/108,287.78 = 44,489.79/x
  3. Step 3: Cross multiply
    78,486.75x = 108,287.78 × 44,489.79
  4. Step 4: Simplify right side
    78,486.75x = 4,817,700,369.32
  5. Step 5: Solve for x
    x = 4,817,700,369.32/78,486.75
  6. Step 6: Final answer
    x = 61,382.34

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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.