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Finding the Fourth Proportional to 123,872.90, 185,821.64 and 39,611.89

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Solution

The fourth proportional to 123,872.90, 185,821.64 and 39,611.89 is: 59,421.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,872.90 : 185,821.64 = 39,611.89 : x
  2. Step 2: Convert to fraction form
    123,872.90/185,821.64 = 39,611.89/x
  3. Step 3: Cross multiply
    123,872.90x = 185,821.64 × 39,611.89
  4. Step 4: Simplify right side
    123,872.90x = 7,360,745,723.63
  5. Step 5: Solve for x
    x = 7,360,745,723.63/123,872.90
  6. Step 6: Final answer
    x = 59,421.76

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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.