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Finding the Fourth Proportional to 100,370.72, 150,561.84 and 30,242.72

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Solution

The fourth proportional to 100,370.72, 150,561.84 and 30,242.72 is: 45,365.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,370.72 : 150,561.84 = 30,242.72 : x
  2. Step 2: Convert to fraction form
    100,370.72/150,561.84 = 30,242.72/x
  3. Step 3: Cross multiply
    100,370.72x = 150,561.84 × 30,242.72
  4. Step 4: Simplify right side
    100,370.72x = 4,553,399,569.80
  5. Step 5: Solve for x
    x = 4,553,399,569.80/100,370.72
  6. Step 6: Final answer
    x = 45,365.82

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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.