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Finding the Fourth Proportional to 66,521, 99,797.94 and 19,773.68

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Solution

The fourth proportional to 66,521, 99,797.94 and 19,773.68 is: 29,665.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,521 : 99,797.94 = 19,773.68 : x
  2. Step 2: Convert to fraction form
    66,521/99,797.94 = 19,773.68/x
  3. Step 3: Cross multiply
    66,521x = 99,797.94 × 19,773.68
  4. Step 4: Simplify right side
    66,521x = 1,973,372,530.22
  5. Step 5: Solve for x
    x = 1,973,372,530.22/66,521
  6. Step 6: Final answer
    x = 29,665.41

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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.