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Finding the Fourth Proportional to 72,986.04, 100,720.68 and 39,452.04

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Solution

The fourth proportional to 72,986.04, 100,720.68 and 39,452.04 is: 54,443.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,986.04 : 100,720.68 = 39,452.04 : x
  2. Step 2: Convert to fraction form
    72,986.04/100,720.68 = 39,452.04/x
  3. Step 3: Cross multiply
    72,986.04x = 100,720.68 × 39,452.04
  4. Step 4: Simplify right side
    72,986.04x = 3,973,635,940.53
  5. Step 5: Solve for x
    x = 3,973,635,940.53/72,986.04
  6. Step 6: Final answer
    x = 54,443.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.