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Finding the Fourth Proportional to 61,222.80, 91,834.20 and 60,639.60

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Solution

The fourth proportional to 61,222.80, 91,834.20 and 60,639.60 is: 90,959.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,222.80 : 91,834.20 = 60,639.60 : x
  2. Step 2: Convert to fraction form
    61,222.80/91,834.20 = 60,639.60/x
  3. Step 3: Cross multiply
    61,222.80x = 91,834.20 × 60,639.60
  4. Step 4: Simplify right side
    61,222.80x = 5,568,789,154.32
  5. Step 5: Solve for x
    x = 5,568,789,154.32/61,222.80
  6. Step 6: Final answer
    x = 90,959.40

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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.