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Finding the Fourth Proportional to 69,203.43, 95,480.98 and 38,978.21

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Solution

The fourth proportional to 69,203.43, 95,480.98 and 38,978.21 is: 53,778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,203.43 : 95,480.98 = 38,978.21 : x
  2. Step 2: Convert to fraction form
    69,203.43/95,480.98 = 38,978.21/x
  3. Step 3: Cross multiply
    69,203.43x = 95,480.98 × 38,978.21
  4. Step 4: Simplify right side
    69,203.43x = 3,721,677,830.70
  5. Step 5: Solve for x
    x = 3,721,677,830.70/69,203.43
  6. Step 6: Final answer
    x = 53,778.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.