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Finding the Fourth Proportional to 64,488.31, 88,992.09 and 38,661.46

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Solution

The fourth proportional to 64,488.31, 88,992.09 and 38,661.46 is: 53,351.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,488.31 : 88,992.09 = 38,661.46 : x
  2. Step 2: Convert to fraction form
    64,488.31/88,992.09 = 38,661.46/x
  3. Step 3: Cross multiply
    64,488.31x = 88,992.09 × 38,661.46
  4. Step 4: Simplify right side
    64,488.31x = 3,440,563,905.37
  5. Step 5: Solve for x
    x = 3,440,563,905.37/64,488.31
  6. Step 6: Final answer
    x = 53,351.75

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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.