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Finding the Fourth Proportional to 61,168.65, 91,730.94 and 21,176.78

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Solution

The fourth proportional to 61,168.65, 91,730.94 and 21,176.78 is: 31,757.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,168.65 : 91,730.94 = 21,176.78 : x
  2. Step 2: Convert to fraction form
    61,168.65/91,730.94 = 21,176.78/x
  3. Step 3: Cross multiply
    61,168.65x = 91,730.94 × 21,176.78
  4. Step 4: Simplify right side
    61,168.65x = 1,942,565,476.92
  5. Step 5: Solve for x
    x = 1,942,565,476.92/61,168.65
  6. Step 6: Final answer
    x = 31,757.53

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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.