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Finding the Fourth Proportional to 86,308.80, 129,481.68 and 48,886.56

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Solution

The fourth proportional to 86,308.80, 129,481.68 and 48,886.56 is: 73,340.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,308.80 : 129,481.68 = 48,886.56 : x
  2. Step 2: Convert to fraction form
    86,308.80/129,481.68 = 48,886.56/x
  3. Step 3: Cross multiply
    86,308.80x = 129,481.68 × 48,886.56
  4. Step 4: Simplify right side
    86,308.80x = 6,329,913,918.22
  5. Step 5: Solve for x
    x = 6,329,913,918.22/86,308.80
  6. Step 6: Final answer
    x = 73,340.31

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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.