Home / 131,221.28-181,093.20-99,339.68

Finding the Fourth Proportional to 131,221.28, 181,093.20 and 99,339.68

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Solution

The fourth proportional to 131,221.28, 181,093.20 and 99,339.68 is: 137,094.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,221.28 : 181,093.20 = 99,339.68 : x
  2. Step 2: Convert to fraction form
    131,221.28/181,093.20 = 99,339.68/x
  3. Step 3: Cross multiply
    131,221.28x = 181,093.20 × 99,339.68
  4. Step 4: Simplify right side
    131,221.28x = 17,989,740,538.18
  5. Step 5: Solve for x
    x = 17,989,740,538.18/131,221.28
  6. Step 6: Final answer
    x = 137,094.69

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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.