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Finding the Fourth Proportional to 72,744.98, 100,568.49 and 72,080.78

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Solution

The fourth proportional to 72,744.98, 100,568.49 and 72,080.78 is: 99,650.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,744.98 : 100,568.49 = 72,080.78 : x
  2. Step 2: Convert to fraction form
    72,744.98/100,568.49 = 72,080.78/x
  3. Step 3: Cross multiply
    72,744.98x = 100,568.49 × 72,080.78
  4. Step 4: Simplify right side
    72,744.98x = 7,249,055,202.62
  5. Step 5: Solve for x
    x = 7,249,055,202.62/72,744.98
  6. Step 6: Final answer
    x = 99,650.25

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1.5x scale

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.