Home / 131,638.21-181,661.62-80,651.04

Finding the Fourth Proportional to 131,638.21, 181,661.62 and 80,651.04

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Solution

The fourth proportional to 131,638.21, 181,661.62 and 80,651.04 is: 111,298.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,638.21 : 181,661.62 = 80,651.04 : x
  2. Step 2: Convert to fraction form
    131,638.21/181,661.62 = 80,651.04/x
  3. Step 3: Cross multiply
    131,638.21x = 181,661.62 × 80,651.04
  4. Step 4: Simplify right side
    131,638.21x = 14,651,198,871.29
  5. Step 5: Solve for x
    x = 14,651,198,871.29/131,638.21
  6. Step 6: Final answer
    x = 111,298.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.