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Finding the Fourth Proportional to 64,990.78, 89,692.77 and 36,701.62

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Solution

The fourth proportional to 64,990.78, 89,692.77 and 36,701.62 is: 50,651.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,990.78 : 89,692.77 = 36,701.62 : x
  2. Step 2: Convert to fraction form
    64,990.78/89,692.77 = 36,701.62/x
  3. Step 3: Cross multiply
    64,990.78x = 89,692.77 × 36,701.62
  4. Step 4: Simplify right side
    64,990.78x = 3,291,869,961.29
  5. Step 5: Solve for x
    x = 3,291,869,961.29/64,990.78
  6. Step 6: Final answer
    x = 50,651.34

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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.