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Finding the Fourth Proportional to 78,118.80, 107,801.64 and 44,128.88

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Solution

The fourth proportional to 78,118.80, 107,801.64 and 44,128.88 is: 60,896.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,118.80 : 107,801.64 = 44,128.88 : x
  2. Step 2: Convert to fraction form
    78,118.80/107,801.64 = 44,128.88/x
  3. Step 3: Cross multiply
    78,118.80x = 107,801.64 × 44,128.88
  4. Step 4: Simplify right side
    78,118.80x = 4,757,165,635.36
  5. Step 5: Solve for x
    x = 4,757,165,635.36/78,118.80
  6. Step 6: Final answer
    x = 60,896.55

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1.5x scale

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.