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Finding the Fourth Proportional to 60,949.80, 91,439.61 and 20,969.40

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Solution

The fourth proportional to 60,949.80, 91,439.61 and 20,969.40 is: 31,459.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,949.80 : 91,439.61 = 20,969.40 : x
  2. Step 2: Convert to fraction form
    60,949.80/91,439.61 = 20,969.40/x
  3. Step 3: Cross multiply
    60,949.80x = 91,439.61 × 20,969.40
  4. Step 4: Simplify right side
    60,949.80x = 1,917,433,757.93
  5. Step 5: Solve for x
    x = 1,917,433,757.93/60,949.80
  6. Step 6: Final answer
    x = 31,459.23

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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.