Home / 154,012.73-212,479.12-100,343.75

Finding the Fourth Proportional to 154,012.73, 212,479.12 and 100,343.75

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Solution

The fourth proportional to 154,012.73, 212,479.12 and 100,343.75 is: 138,436.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,012.73 : 212,479.12 = 100,343.75 : x
  2. Step 2: Convert to fraction form
    154,012.73/212,479.12 = 100,343.75/x
  3. Step 3: Cross multiply
    154,012.73x = 212,479.12 × 100,343.75
  4. Step 4: Simplify right side
    154,012.73x = 21,320,951,977.84
  5. Step 5: Solve for x
    x = 21,320,951,977.84/154,012.73
  6. Step 6: Final answer
    x = 138,436.29

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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.