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Finding the Fourth Proportional to 64,908.45, 89,513.61 and 49,801.74

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Solution

The fourth proportional to 64,908.45, 89,513.61 and 49,801.74 is: 68,680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,908.45 : 89,513.61 = 49,801.74 : x
  2. Step 2: Convert to fraction form
    64,908.45/89,513.61 = 49,801.74/x
  3. Step 3: Cross multiply
    64,908.45x = 89,513.61 × 49,801.74
  4. Step 4: Simplify right side
    64,908.45x = 4,457,933,531.68
  5. Step 5: Solve for x
    x = 4,457,933,531.68/64,908.45
  6. Step 6: Final answer
    x = 68,680.33

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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.