Home / 131,728.80-181,820.88-81,399.36

Finding the Fourth Proportional to 131,728.80, 181,820.88 and 81,399.36

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Solution

The fourth proportional to 131,728.80, 181,820.88 and 81,399.36 is: 112,352.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,728.80 : 181,820.88 = 81,399.36 : x
  2. Step 2: Convert to fraction form
    131,728.80/181,820.88 = 81,399.36/x
  3. Step 3: Cross multiply
    131,728.80x = 181,820.88 × 81,399.36
  4. Step 4: Simplify right side
    131,728.80x = 14,800,103,266.64
  5. Step 5: Solve for x
    x = 14,800,103,266.64/131,728.80
  6. Step 6: Final answer
    x = 112,352.83

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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.