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Finding the Fourth Proportional to 61,357.20, 91,906.20 and 50,989.20

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Solution

The fourth proportional to 61,357.20, 91,906.20 and 50,989.20 is: 76,376.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,357.20 : 91,906.20 = 50,989.20 : x
  2. Step 2: Convert to fraction form
    61,357.20/91,906.20 = 50,989.20/x
  3. Step 3: Cross multiply
    61,357.20x = 91,906.20 × 50,989.20
  4. Step 4: Simplify right side
    61,357.20x = 4,686,223,613.04
  5. Step 5: Solve for x
    x = 4,686,223,613.04/61,357.20
  6. Step 6: Final answer
    x = 76,376.10

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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.