Home / 109,982.20-164,681.70-86,654.20

Finding the Fourth Proportional to 109,982.20, 164,681.70 and 86,654.20

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Solution

The fourth proportional to 109,982.20, 164,681.70 and 86,654.20 is: 129,751.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,982.20 : 164,681.70 = 86,654.20 : x
  2. Step 2: Convert to fraction form
    109,982.20/164,681.70 = 86,654.20/x
  3. Step 3: Cross multiply
    109,982.20x = 164,681.70 × 86,654.20
  4. Step 4: Simplify right side
    109,982.20x = 14,270,360,968.14
  5. Step 5: Solve for x
    x = 14,270,360,968.14/109,982.20
  6. Step 6: Final answer
    x = 129,751.55

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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.