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Finding the Fourth Proportional to 39,864.80, 59,845.80 and 20,133.20

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Solution

The fourth proportional to 39,864.80, 59,845.80 and 20,133.20 is: 30,224.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,864.80 : 59,845.80 = 20,133.20 : x
  2. Step 2: Convert to fraction form
    39,864.80/59,845.80 = 20,133.20/x
  3. Step 3: Cross multiply
    39,864.80x = 59,845.80 × 20,133.20
  4. Step 4: Simplify right side
    39,864.80x = 1,204,887,460.56
  5. Step 5: Solve for x
    x = 1,204,887,460.56/39,864.80
  6. Step 6: Final answer
    x = 30,224.34

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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.