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Finding the Fourth Proportional to 64,977.58, 89,687.82 and 38,121.22

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Solution

The fourth proportional to 64,977.58, 89,687.82 and 38,121.22 is: 52,618.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,977.58 : 89,687.82 = 38,121.22 : x
  2. Step 2: Convert to fraction form
    64,977.58/89,687.82 = 38,121.22/x
  3. Step 3: Cross multiply
    64,977.58x = 89,687.82 × 38,121.22
  4. Step 4: Simplify right side
    64,977.58x = 3,419,009,117.54
  5. Step 5: Solve for x
    x = 3,419,009,117.54/64,977.58
  6. Step 6: Final answer
    x = 52,618.29

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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.