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Finding the Fourth Proportional to 60,515.66, 90,773.90 and 21,072.65

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Solution

The fourth proportional to 60,515.66, 90,773.90 and 21,072.65 is: 31,609.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,515.66 : 90,773.90 = 21,072.65 : x
  2. Step 2: Convert to fraction form
    60,515.66/90,773.90 = 21,072.65/x
  3. Step 3: Cross multiply
    60,515.66x = 90,773.90 × 21,072.65
  4. Step 4: Simplify right side
    60,515.66x = 1,912,846,064.60
  5. Step 5: Solve for x
    x = 1,912,846,064.60/60,515.66
  6. Step 6: Final answer
    x = 31,609.11

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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.