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Finding the Fourth Proportional to 78,817.68, 118,163.88 and 45,500.04

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Solution

The fourth proportional to 78,817.68, 118,163.88 and 45,500.04 is: 68,213.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,817.68 : 118,163.88 = 45,500.04 : x
  2. Step 2: Convert to fraction form
    78,817.68/118,163.88 = 45,500.04/x
  3. Step 3: Cross multiply
    78,817.68x = 118,163.88 × 45,500.04
  4. Step 4: Simplify right side
    78,817.68x = 5,376,461,266.56
  5. Step 5: Solve for x
    x = 5,376,461,266.56/78,817.68
  6. Step 6: Final answer
    x = 68,213.90

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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.