Home / 123,979.40-185,969.10-86,654.60

Finding the Fourth Proportional to 123,979.40, 185,969.10 and 86,654.60

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Solution

The fourth proportional to 123,979.40, 185,969.10 and 86,654.60 is: 129,981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,979.40 : 185,969.10 = 86,654.60 : x
  2. Step 2: Convert to fraction form
    123,979.40/185,969.10 = 86,654.60/x
  3. Step 3: Cross multiply
    123,979.40x = 185,969.10 × 86,654.60
  4. Step 4: Simplify right side
    123,979.40x = 16,115,077,972.86
  5. Step 5: Solve for x
    x = 16,115,077,972.86/123,979.40
  6. Step 6: Final answer
    x = 129,981.90

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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.