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Finding the Fourth Proportional to 72,949.97, 109,434.53 and 28,570.96

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Solution

The fourth proportional to 72,949.97, 109,434.53 and 28,570.96 is: 42,860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,949.97 : 109,434.53 = 28,570.96 : x
  2. Step 2: Convert to fraction form
    72,949.97/109,434.53 = 28,570.96/x
  3. Step 3: Cross multiply
    72,949.97x = 109,434.53 × 28,570.96
  4. Step 4: Simplify right side
    72,949.97x = 3,126,649,579.25
  5. Step 5: Solve for x
    x = 3,126,649,579.25/72,949.97
  6. Step 6: Final answer
    x = 42,860.19

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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.