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Finding the Fourth Proportional to 78,768.96, 108,696.84 and 44,772.72

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Solution

The fourth proportional to 78,768.96, 108,696.84 and 44,772.72 is: 61,783.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,768.96 : 108,696.84 = 44,772.72 : x
  2. Step 2: Convert to fraction form
    78,768.96/108,696.84 = 44,772.72/x
  3. Step 3: Cross multiply
    78,768.96x = 108,696.84 × 44,772.72
  4. Step 4: Simplify right side
    78,768.96x = 4,866,653,182.20
  5. Step 5: Solve for x
    x = 4,866,653,182.20/78,768.96
  6. Step 6: Final answer
    x = 61,783.90

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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.