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Finding the Fourth Proportional to 79,381.60, 109,538.28 and 45,398.96

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Solution

The fourth proportional to 79,381.60, 109,538.28 and 45,398.96 is: 62,645.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,381.60 : 109,538.28 = 45,398.96 : x
  2. Step 2: Convert to fraction form
    79,381.60/109,538.28 = 45,398.96/x
  3. Step 3: Cross multiply
    79,381.60x = 109,538.28 × 45,398.96
  4. Step 4: Simplify right side
    79,381.60x = 4,972,923,992.19
  5. Step 5: Solve for x
    x = 4,972,923,992.19/79,381.60
  6. Step 6: Final answer
    x = 62,645.80

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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.