Home / 131,728.78-181,790.13-80,731.68

Finding the Fourth Proportional to 131,728.78, 181,790.13 and 80,731.68

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Solution

The fourth proportional to 131,728.78, 181,790.13 and 80,731.68 is: 111,412.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,728.78 : 181,790.13 = 80,731.68 : x
  2. Step 2: Convert to fraction form
    131,728.78/181,790.13 = 80,731.68/x
  3. Step 3: Cross multiply
    131,728.78x = 181,790.13 × 80,731.68
  4. Step 4: Simplify right side
    131,728.78x = 14,676,222,602.32
  5. Step 5: Solve for x
    x = 14,676,222,602.32/131,728.78
  6. Step 6: Final answer
    x = 111,412.42

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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.