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Finding the Fourth Proportional to 64,698.39, 89,277.51 and 47,711.78

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Solution

The fourth proportional to 64,698.39, 89,277.51 and 47,711.78 is: 65,837.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,698.39 : 89,277.51 = 47,711.78 : x
  2. Step 2: Convert to fraction form
    64,698.39/89,277.51 = 47,711.78/x
  3. Step 3: Cross multiply
    64,698.39x = 89,277.51 × 47,711.78
  4. Step 4: Simplify right side
    64,698.39x = 4,259,588,469.68
  5. Step 5: Solve for x
    x = 4,259,588,469.68/64,698.39
  6. Step 6: Final answer
    x = 65,837.63

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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.