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Finding the Fourth Proportional to 78,790.17, 118,186.88 and 43,951.53

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Solution

The fourth proportional to 78,790.17, 118,186.88 and 43,951.53 is: 65,928.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,790.17 : 118,186.88 = 43,951.53 : x
  2. Step 2: Convert to fraction form
    78,790.17/118,186.88 = 43,951.53/x
  3. Step 3: Cross multiply
    78,790.17x = 118,186.88 × 43,951.53
  4. Step 4: Simplify right side
    78,790.17x = 5,194,493,982.17
  5. Step 5: Solve for x
    x = 5,194,493,982.17/78,790.17
  6. Step 6: Final answer
    x = 65,928.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.