Home / 99,163.11-148,412.57-81,393.20

Finding the Fourth Proportional to 99,163.11, 148,412.57 and 81,393.20

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Solution

The fourth proportional to 99,163.11, 148,412.57 and 81,393.20 is: 121,817.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,163.11 : 148,412.57 = 81,393.20 : x
  2. Step 2: Convert to fraction form
    99,163.11/148,412.57 = 81,393.20/x
  3. Step 3: Cross multiply
    99,163.11x = 148,412.57 × 81,393.20
  4. Step 4: Simplify right side
    99,163.11x = 12,079,772,843.50
  5. Step 5: Solve for x
    x = 12,079,772,843.50/99,163.11
  6. Step 6: Final answer
    x = 121,817.20

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1.5x scale

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.