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Finding the Fourth Proportional to 78,722.71, 108,631.91 and 44,272.59

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Solution

The fourth proportional to 78,722.71, 108,631.91 and 44,272.59 is: 61,093.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,722.71 : 108,631.91 = 44,272.59 : x
  2. Step 2: Convert to fraction form
    78,722.71/108,631.91 = 44,272.59/x
  3. Step 3: Cross multiply
    78,722.71x = 108,631.91 × 44,272.59
  4. Step 4: Simplify right side
    78,722.71x = 4,809,416,012.35
  5. Step 5: Solve for x
    x = 4,809,416,012.35/78,722.71
  6. Step 6: Final answer
    x = 61,093.12

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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.