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Finding the Fourth Proportional to 78,780.72, 108,718.74 and 44,788.44

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Solution

The fourth proportional to 78,780.72, 108,718.74 and 44,788.44 is: 61,808.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.72 : 108,718.74 = 44,788.44 : x
  2. Step 2: Convert to fraction form
    78,780.72/108,718.74 = 44,788.44/x
  3. Step 3: Cross multiply
    78,780.72x = 108,718.74 × 44,788.44
  4. Step 4: Simplify right side
    78,780.72x = 4,869,342,763.37
  5. Step 5: Solve for x
    x = 4,869,342,763.37/78,780.72
  6. Step 6: Final answer
    x = 61,808.81

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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.