Home / 138,939.80-191,631.12-119,591.64

Finding the Fourth Proportional to 138,939.80, 191,631.12 and 119,591.64

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Solution

The fourth proportional to 138,939.80, 191,631.12 and 119,591.64 is: 164,945.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,939.80 : 191,631.12 = 119,591.64 : x
  2. Step 2: Convert to fraction form
    138,939.80/191,631.12 = 119,591.64/x
  3. Step 3: Cross multiply
    138,939.80x = 191,631.12 × 119,591.64
  4. Step 4: Simplify right side
    138,939.80x = 22,917,479,915.84
  5. Step 5: Solve for x
    x = 22,917,479,915.84/138,939.80
  6. Step 6: Final answer
    x = 164,945.39

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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.