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Finding the Fourth Proportional to 100,557.15, 150,890.40 and 41,398.80

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Solution

The fourth proportional to 100,557.15, 150,890.40 and 41,398.80 is: 62,120.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,557.15 : 150,890.40 = 41,398.80 : x
  2. Step 2: Convert to fraction form
    100,557.15/150,890.40 = 41,398.80/x
  3. Step 3: Cross multiply
    100,557.15x = 150,890.40 × 41,398.80
  4. Step 4: Simplify right side
    100,557.15x = 6,246,681,491.52
  5. Step 5: Solve for x
    x = 6,246,681,491.52/100,557.15
  6. Step 6: Final answer
    x = 62,120.71

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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.