Home / 154,186.60-212,813.46-100,378.36

Finding the Fourth Proportional to 154,186.60, 212,813.46 and 100,378.36

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Solution

The fourth proportional to 154,186.60, 212,813.46 and 100,378.36 is: 138,545.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,186.60 : 212,813.46 = 100,378.36 : x
  2. Step 2: Convert to fraction form
    154,186.60/212,813.46 = 100,378.36/x
  3. Step 3: Cross multiply
    154,186.60x = 212,813.46 × 100,378.36
  4. Step 4: Simplify right side
    154,186.60x = 21,361,866,100.73
  5. Step 5: Solve for x
    x = 21,361,866,100.73/154,186.60
  6. Step 6: Final answer
    x = 138,545.54

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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.