Home / 131,201.28-181,061.76-74,620.80

Finding the Fourth Proportional to 131,201.28, 181,061.76 and 74,620.80

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Solution

The fourth proportional to 131,201.28, 181,061.76 and 74,620.80 is: 102,978.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,201.28 : 181,061.76 = 74,620.80 : x
  2. Step 2: Convert to fraction form
    131,201.28/181,061.76 = 74,620.80/x
  3. Step 3: Cross multiply
    131,201.28x = 181,061.76 × 74,620.80
  4. Step 4: Simplify right side
    131,201.28x = 13,510,973,380.61
  5. Step 5: Solve for x
    x = 13,510,973,380.61/131,201.28
  6. Step 6: Final answer
    x = 102,978.98

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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.