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Finding the Fourth Proportional to 79,062, 109,131.48 and 56,770.80

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Solution

The fourth proportional to 79,062, 109,131.48 and 56,770.80 is: 78,362.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,062 : 109,131.48 = 56,770.80 : x
  2. Step 2: Convert to fraction form
    79,062/109,131.48 = 56,770.80/x
  3. Step 3: Cross multiply
    79,062x = 109,131.48 × 56,770.80
  4. Step 4: Simplify right side
    79,062x = 6,195,481,424.78
  5. Step 5: Solve for x
    x = 6,195,481,424.78/79,062
  6. Step 6: Final answer
    x = 78,362.32

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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.