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Finding the Fourth Proportional to 66,260.31, 99,369.41 and 21,878.79

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Solution

The fourth proportional to 66,260.31, 99,369.41 and 21,878.79 is: 32,811.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,260.31 : 99,369.41 = 21,878.79 : x
  2. Step 2: Convert to fraction form
    66,260.31/99,369.41 = 21,878.79/x
  3. Step 3: Cross multiply
    66,260.31x = 99,369.41 × 21,878.79
  4. Step 4: Simplify right side
    66,260.31x = 2,174,082,344.42
  5. Step 5: Solve for x
    x = 2,174,082,344.42/66,260.31
  6. Step 6: Final answer
    x = 32,811.23

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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.