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Finding the Fourth Proportional to 65,939.74, 90,994.93 and 38,715.37

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Solution

The fourth proportional to 65,939.74, 90,994.93 and 38,715.37 is: 53,426.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,939.74 : 90,994.93 = 38,715.37 : x
  2. Step 2: Convert to fraction form
    65,939.74/90,994.93 = 38,715.37/x
  3. Step 3: Cross multiply
    65,939.74x = 90,994.93 × 38,715.37
  4. Step 4: Simplify right side
    65,939.74x = 3,522,902,058.80
  5. Step 5: Solve for x
    x = 3,522,902,058.80/65,939.74
  6. Step 6: Final answer
    x = 53,426.09

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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.