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Finding the Fourth Proportional to 100,851.40, 151,605.15 and 71,472.70

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Solution

The fourth proportional to 100,851.40, 151,605.15 and 71,472.70 is: 107,441.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,851.40 : 151,605.15 = 71,472.70 : x
  2. Step 2: Convert to fraction form
    100,851.40/151,605.15 = 71,472.70/x
  3. Step 3: Cross multiply
    100,851.40x = 151,605.15 × 71,472.70
  4. Step 4: Simplify right side
    100,851.40x = 10,835,629,404.41
  5. Step 5: Solve for x
    x = 10,835,629,404.41/100,851.40
  6. Step 6: Final answer
    x = 107,441.54

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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.