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Finding the Fourth Proportional to 109,764.80, 164,647.20 and 26,658.80

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Solution

The fourth proportional to 109,764.80, 164,647.20 and 26,658.80 is: 39,988.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,764.80 : 164,647.20 = 26,658.80 : x
  2. Step 2: Convert to fraction form
    109,764.80/164,647.20 = 26,658.80/x
  3. Step 3: Cross multiply
    109,764.80x = 164,647.20 × 26,658.80
  4. Step 4: Simplify right side
    109,764.80x = 4,389,296,775.36
  5. Step 5: Solve for x
    x = 4,389,296,775.36/109,764.80
  6. Step 6: Final answer
    x = 39,988.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.