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Finding the Fourth Proportional to 67,114.60, 100,748.70 and 39,428.20

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Solution

The fourth proportional to 67,114.60, 100,748.70 and 39,428.20 is: 59,187.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,114.60 : 100,748.70 = 39,428.20 : x
  2. Step 2: Convert to fraction form
    67,114.60/100,748.70 = 39,428.20/x
  3. Step 3: Cross multiply
    67,114.60x = 100,748.70 × 39,428.20
  4. Step 4: Simplify right side
    67,114.60x = 3,972,339,893.34
  5. Step 5: Solve for x
    x = 3,972,339,893.34/67,114.60
  6. Step 6: Final answer
    x = 59,187.42

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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.