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Finding the Fourth Proportional to 64,992, 89,692.80 and 36,700.80

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Solution

The fourth proportional to 64,992, 89,692.80 and 36,700.80 is: 50,649.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,992 : 89,692.80 = 36,700.80 : x
  2. Step 2: Convert to fraction form
    64,992/89,692.80 = 36,700.80/x
  3. Step 3: Cross multiply
    64,992x = 89,692.80 × 36,700.80
  4. Step 4: Simplify right side
    64,992x = 3,291,797,514.24
  5. Step 5: Solve for x
    x = 3,291,797,514.24/64,992
  6. Step 6: Final answer
    x = 50,649.27

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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.