Home / 66,638.38-99,973.36-19,890.04

Finding the Fourth Proportional to 66,638.38, 99,973.36 and 19,890.04

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Solution

The fourth proportional to 66,638.38, 99,973.36 and 19,890.04 is: 29,839.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,638.38 : 99,973.36 = 19,890.04 : x
  2. Step 2: Convert to fraction form
    66,638.38/99,973.36 = 19,890.04/x
  3. Step 3: Cross multiply
    66,638.38x = 99,973.36 × 19,890.04
  4. Step 4: Simplify right side
    66,638.38x = 1,988,474,129.33
  5. Step 5: Solve for x
    x = 1,988,474,129.33/66,638.38
  6. Step 6: Final answer
    x = 29,839.77

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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.