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Finding the Fourth Proportional to 43,087.80, 64,610.10 and 19,687.80

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Solution

The fourth proportional to 43,087.80, 64,610.10 and 19,687.80 is: 29,521.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,087.80 : 64,610.10 = 19,687.80 : x
  2. Step 2: Convert to fraction form
    43,087.80/64,610.10 = 19,687.80/x
  3. Step 3: Cross multiply
    43,087.80x = 64,610.10 × 19,687.80
  4. Step 4: Simplify right side
    43,087.80x = 1,272,030,726.78
  5. Step 5: Solve for x
    x = 1,272,030,726.78/43,087.80
  6. Step 6: Final answer
    x = 29,521.83

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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.