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Finding the Fourth Proportional to 66,521.70, 99,801.99 and 19,775.70

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Solution

The fourth proportional to 66,521.70, 99,801.99 and 19,775.70 is: 29,669.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,521.70 : 99,801.99 = 19,775.70 : x
  2. Step 2: Convert to fraction form
    66,521.70/99,801.99 = 19,775.70/x
  3. Step 3: Cross multiply
    66,521.70x = 99,801.99 × 19,775.70
  4. Step 4: Simplify right side
    66,521.70x = 1,973,654,213.64
  5. Step 5: Solve for x
    x = 1,973,654,213.64/66,521.70
  6. Step 6: Final answer
    x = 29,669.33

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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.