Home / 99,163.36-148,412.94-81,393.45

Finding the Fourth Proportional to 99,163.36, 148,412.94 and 81,393.45

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Solution

The fourth proportional to 99,163.36, 148,412.94 and 81,393.45 is: 121,817.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,163.36 : 148,412.94 = 81,393.45 : x
  2. Step 2: Convert to fraction form
    99,163.36/148,412.94 = 81,393.45/x
  3. Step 3: Cross multiply
    99,163.36x = 148,412.94 × 81,393.45
  4. Step 4: Simplify right side
    99,163.36x = 12,079,840,469.18
  5. Step 5: Solve for x
    x = 12,079,840,469.18/99,163.36
  6. Step 6: Final answer
    x = 121,817.58

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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.