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Finding the Fourth Proportional to 64,993.18, 89,691.22 and 38,136.15

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Solution

The fourth proportional to 64,993.18, 89,691.22 and 38,136.15 is: 52,628.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,993.18 : 89,691.22 = 38,136.15 : x
  2. Step 2: Convert to fraction form
    64,993.18/89,691.22 = 38,136.15/x
  3. Step 3: Cross multiply
    64,993.18x = 89,691.22 × 38,136.15
  4. Step 4: Simplify right side
    64,993.18x = 3,420,477,819.60
  5. Step 5: Solve for x
    x = 3,420,477,819.60/64,993.18
  6. Step 6: Final answer
    x = 52,628.26

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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.