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Finding the Fourth Proportional to 165,673.70, 248,510.55 and 81,446.87

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Solution

The fourth proportional to 165,673.70, 248,510.55 and 81,446.87 is: 122,170.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,673.70 : 248,510.55 = 81,446.87 : x
  2. Step 2: Convert to fraction form
    165,673.70/248,510.55 = 81,446.87/x
  3. Step 3: Cross multiply
    165,673.70x = 248,510.55 × 81,446.87
  4. Step 4: Simplify right side
    165,673.70x = 20,240,406,459.48
  5. Step 5: Solve for x
    x = 20,240,406,459.48/165,673.70
  6. Step 6: Final answer
    x = 122,170.31

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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.