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Finding the Fourth Proportional to 72,568.97, 108,860.34 and 28,199.15

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Solution

The fourth proportional to 72,568.97, 108,860.34 and 28,199.15 is: 42,301.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,568.97 : 108,860.34 = 28,199.15 : x
  2. Step 2: Convert to fraction form
    72,568.97/108,860.34 = 28,199.15/x
  3. Step 3: Cross multiply
    72,568.97x = 108,860.34 × 28,199.15
  4. Step 4: Simplify right side
    72,568.97x = 3,069,768,512.41
  5. Step 5: Solve for x
    x = 3,069,768,512.41/72,568.97
  6. Step 6: Final answer
    x = 42,301.40

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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.