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Finding the Fourth Proportional to 64,995.74, 89,694.72 and 38,138.70

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Solution

The fourth proportional to 64,995.74, 89,694.72 and 38,138.70 is: 52,631.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,995.74 : 89,694.72 = 38,138.70 : x
  2. Step 2: Convert to fraction form
    64,995.74/89,694.72 = 38,138.70/x
  3. Step 3: Cross multiply
    64,995.74x = 89,694.72 × 38,138.70
  4. Step 4: Simplify right side
    64,995.74x = 3,420,839,742.22
  5. Step 5: Solve for x
    x = 3,420,839,742.22/64,995.74
  6. Step 6: Final answer
    x = 52,631.75

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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.