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Finding the Fourth Proportional to 78,776, 108,720.24 and 44,789.64

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Solution

The fourth proportional to 78,776, 108,720.24 and 44,789.64 is: 61,815.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,776 : 108,720.24 = 44,789.64 : x
  2. Step 2: Convert to fraction form
    78,776/108,720.24 = 44,789.64/x
  3. Step 3: Cross multiply
    78,776x = 108,720.24 × 44,789.64
  4. Step 4: Simplify right side
    78,776x = 4,869,540,410.31
  5. Step 5: Solve for x
    x = 4,869,540,410.31/78,776
  6. Step 6: Final answer
    x = 61,815.03

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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.