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Finding the Fourth Proportional to 78,871.28, 108,840.84 and 44,879

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Solution

The fourth proportional to 78,871.28, 108,840.84 and 44,879 is: 61,932.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.28 : 108,840.84 = 44,879 : x
  2. Step 2: Convert to fraction form
    78,871.28/108,840.84 = 44,879/x
  3. Step 3: Cross multiply
    78,871.28x = 108,840.84 × 44,879
  4. Step 4: Simplify right side
    78,871.28x = 4,884,668,058.36
  5. Step 5: Solve for x
    x = 4,884,668,058.36/78,871.28
  6. Step 6: Final answer
    x = 61,932.15

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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.