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Finding the Fourth Proportional to 63,770.67, 87,979.76 and 39,888.27

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Solution

The fourth proportional to 63,770.67, 87,979.76 and 39,888.27 is: 55,030.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,770.67 : 87,979.76 = 39,888.27 : x
  2. Step 2: Convert to fraction form
    63,770.67/87,979.76 = 39,888.27/x
  3. Step 3: Cross multiply
    63,770.67x = 87,979.76 × 39,888.27
  4. Step 4: Simplify right side
    63,770.67x = 3,509,360,221.97
  5. Step 5: Solve for x
    x = 3,509,360,221.97/63,770.67
  6. Step 6: Final answer
    x = 55,030.94

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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.