Home / 99,546.40-149,319.33-81,979.12

Finding the Fourth Proportional to 99,546.40, 149,319.33 and 81,979.12

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Solution

The fourth proportional to 99,546.40, 149,319.33 and 81,979.12 is: 122,968.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,546.40 : 149,319.33 = 81,979.12 : x
  2. Step 2: Convert to fraction form
    99,546.40/149,319.33 = 81,979.12/x
  3. Step 3: Cross multiply
    99,546.40x = 149,319.33 × 81,979.12
  4. Step 4: Simplify right side
    99,546.40x = 12,241,067,272.39
  5. Step 5: Solve for x
    x = 12,241,067,272.39/99,546.40
  6. Step 6: Final answer
    x = 122,968.46

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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.