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Finding the Fourth Proportional to 99,717.66, 149,365.53 and 80,660.46

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Solution

The fourth proportional to 99,717.66, 149,365.53 and 80,660.46 is: 120,820.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,717.66 : 149,365.53 = 80,660.46 : x
  2. Step 2: Convert to fraction form
    99,717.66/149,365.53 = 80,660.46/x
  3. Step 3: Cross multiply
    99,717.66x = 149,365.53 × 80,660.46
  4. Step 4: Simplify right side
    99,717.66x = 12,047,892,357.94
  5. Step 5: Solve for x
    x = 12,047,892,357.94/99,717.66
  6. Step 6: Final answer
    x = 120,820.05

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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.