Home / 131,508.45-181,485.23-80,520.21

Finding the Fourth Proportional to 131,508.45, 181,485.23 and 80,520.21

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Solution

The fourth proportional to 131,508.45, 181,485.23 and 80,520.21 is: 111,120.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,508.45 : 181,485.23 = 80,520.21 : x
  2. Step 2: Convert to fraction form
    131,508.45/181,485.23 = 80,520.21/x
  3. Step 3: Cross multiply
    131,508.45x = 181,485.23 × 80,520.21
  4. Step 4: Simplify right side
    131,508.45x = 14,613,228,428.90
  5. Step 5: Solve for x
    x = 14,613,228,428.90/131,508.45
  6. Step 6: Final answer
    x = 111,120.07

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1.5x scale

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.