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Finding the Fourth Proportional to 57,376.82, 86,030.00 and 19,920.80

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Solution

The fourth proportional to 57,376.82, 86,030.00 and 19,920.80 is: 29,868.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,376.82 : 86,030.00 = 19,920.80 : x
  2. Step 2: Convert to fraction form
    57,376.82/86,030.00 = 19,920.80/x
  3. Step 3: Cross multiply
    57,376.82x = 86,030.00 × 19,920.80
  4. Step 4: Simplify right side
    57,376.82x = 1,713,786,614.17
  5. Step 5: Solve for x
    x = 1,713,786,614.17/57,376.82
  6. Step 6: Final answer
    x = 29,868.97

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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.