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Finding the Fourth Proportional to 51,115.65, 76,731.08 and 39,480.45

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Solution

The fourth proportional to 51,115.65, 76,731.08 and 39,480.45 is: 59,265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,115.65 : 76,731.08 = 39,480.45 : x
  2. Step 2: Convert to fraction form
    51,115.65/76,731.08 = 39,480.45/x
  3. Step 3: Cross multiply
    51,115.65x = 76,731.08 × 39,480.45
  4. Step 4: Simplify right side
    51,115.65x = 3,029,377,369.98
  5. Step 5: Solve for x
    x = 3,029,377,369.98/51,115.65
  6. Step 6: Final answer
    x = 59,265.16

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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.