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Finding the Fourth Proportional to 64,786.65, 97,193.61 and 36,720.15

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Solution

The fourth proportional to 64,786.65, 97,193.61 and 36,720.15 is: 55,087.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,786.65 : 97,193.61 = 36,720.15 : x
  2. Step 2: Convert to fraction form
    64,786.65/97,193.61 = 36,720.15/x
  3. Step 3: Cross multiply
    64,786.65x = 97,193.61 × 36,720.15
  4. Step 4: Simplify right side
    64,786.65x = 3,568,963,938.24
  5. Step 5: Solve for x
    x = 3,568,963,938.24/64,786.65
  6. Step 6: Final answer
    x = 55,087.95

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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.