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Finding the Fourth Proportional to 100,409.78, 150,639.60 and 49,832.55

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Solution

The fourth proportional to 100,409.78, 150,639.60 and 49,832.55 is: 74,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,409.78 : 150,639.60 = 49,832.55 : x
  2. Step 2: Convert to fraction form
    100,409.78/150,639.60 = 49,832.55/x
  3. Step 3: Cross multiply
    100,409.78x = 150,639.60 × 49,832.55
  4. Step 4: Simplify right side
    100,409.78x = 7,506,755,398.98
  5. Step 5: Solve for x
    x = 7,506,755,398.98/100,409.78
  6. Step 6: Final answer
    x = 74,761.20

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1.5x scale

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.