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Finding the Fourth Proportional to 39,897.90, 59,832.45 and 20,169.90

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Solution

The fourth proportional to 39,897.90, 59,832.45 and 20,169.90 is: 30,247.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,897.90 : 59,832.45 = 20,169.90 : x
  2. Step 2: Convert to fraction form
    39,897.90/59,832.45 = 20,169.90/x
  3. Step 3: Cross multiply
    39,897.90x = 59,832.45 × 20,169.90
  4. Step 4: Simplify right side
    39,897.90x = 1,206,814,533.26
  5. Step 5: Solve for x
    x = 1,206,814,533.26/39,897.90
  6. Step 6: Final answer
    x = 30,247.57

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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.