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Finding the Fourth Proportional to 65,398.73, 90,249.39 and 38,542.37

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Solution

The fourth proportional to 65,398.73, 90,249.39 and 38,542.37 is: 53,187.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,398.73 : 90,249.39 = 38,542.37 : x
  2. Step 2: Convert to fraction form
    65,398.73/90,249.39 = 38,542.37/x
  3. Step 3: Cross multiply
    65,398.73x = 90,249.39 × 38,542.37
  4. Step 4: Simplify right side
    65,398.73x = 3,478,425,381.65
  5. Step 5: Solve for x
    x = 3,478,425,381.65/65,398.73
  6. Step 6: Final answer
    x = 53,187.97

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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.