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Finding the Fourth Proportional to 89,540.80, 123,556.60 and 51,808

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Solution

The fourth proportional to 89,540.80, 123,556.60 and 51,808 is: 71,489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,540.80 : 123,556.60 = 51,808 : x
  2. Step 2: Convert to fraction form
    89,540.80/123,556.60 = 51,808/x
  3. Step 3: Cross multiply
    89,540.80x = 123,556.60 × 51,808
  4. Step 4: Simplify right side
    89,540.80x = 6,401,220,332.80
  5. Step 5: Solve for x
    x = 6,401,220,332.80/89,540.80
  6. Step 6: Final answer
    x = 71,489.43

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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.