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Finding the Fourth Proportional to 138,967.65, 208,290.56 and 63,930.33

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Solution

The fourth proportional to 138,967.65, 208,290.56 and 63,930.33 is: 95,821.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,967.65 : 208,290.56 = 63,930.33 : x
  2. Step 2: Convert to fraction form
    138,967.65/208,290.56 = 63,930.33/x
  3. Step 3: Cross multiply
    138,967.65x = 208,290.56 × 63,930.33
  4. Step 4: Simplify right side
    138,967.65x = 13,316,083,917.03
  5. Step 5: Solve for x
    x = 13,316,083,917.03/138,967.65
  6. Step 6: Final answer
    x = 95,821.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.