Home / 65,986.20-98,979.30-54,905.40

Finding the Fourth Proportional to 65,986.20, 98,979.30 and 54,905.40

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Solution

The fourth proportional to 65,986.20, 98,979.30 and 54,905.40 is: 82,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,986.20 : 98,979.30 = 54,905.40 : x
  2. Step 2: Convert to fraction form
    65,986.20/98,979.30 = 54,905.40/x
  3. Step 3: Cross multiply
    65,986.20x = 98,979.30 × 54,905.40
  4. Step 4: Simplify right side
    65,986.20x = 5,434,498,058.22
  5. Step 5: Solve for x
    x = 5,434,498,058.22/65,986.20
  6. Step 6: Final answer
    x = 82,358.10

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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.