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Finding the Fourth Proportional to 79,496.26, 109,747.50 and 61,307.20

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Solution

The fourth proportional to 79,496.26, 109,747.50 and 61,307.20 is: 84,636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,496.26 : 109,747.50 = 61,307.20 : x
  2. Step 2: Convert to fraction form
    79,496.26/109,747.50 = 61,307.20/x
  3. Step 3: Cross multiply
    79,496.26x = 109,747.50 × 61,307.20
  4. Step 4: Simplify right side
    79,496.26x = 6,728,311,932
  5. Step 5: Solve for x
    x = 6,728,311,932/79,496.26
  6. Step 6: Final answer
    x = 84,636.84

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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.