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Finding the Fourth Proportional to 165,886.70, 248,903.55 and 86,982.17

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Solution

The fourth proportional to 165,886.70, 248,903.55 and 86,982.17 is: 130,511.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,886.70 : 248,903.55 = 86,982.17 : x
  2. Step 2: Convert to fraction form
    165,886.70/248,903.55 = 86,982.17/x
  3. Step 3: Cross multiply
    165,886.70x = 248,903.55 × 86,982.17
  4. Step 4: Simplify right side
    165,886.70x = 21,650,169,655.19
  5. Step 5: Solve for x
    x = 21,650,169,655.19/165,886.70
  6. Step 6: Final answer
    x = 130,511.79

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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.