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Finding the Fourth Proportional to 64,972.13, 89,661.53 and 36,679.64

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Solution

The fourth proportional to 64,972.13, 89,661.53 and 36,679.64 is: 50,617.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,972.13 : 89,661.53 = 36,679.64 : x
  2. Step 2: Convert to fraction form
    64,972.13/89,661.53 = 36,679.64/x
  3. Step 3: Cross multiply
    64,972.13x = 89,661.53 × 36,679.64
  4. Step 4: Simplify right side
    64,972.13x = 3,288,752,285.64
  5. Step 5: Solve for x
    x = 3,288,752,285.64/64,972.13
  6. Step 6: Final answer
    x = 50,617.90

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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.