Home / 154,015.82-212,641.80-137,855.12

Finding the Fourth Proportional to 154,015.82, 212,641.80 and 137,855.12

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Solution

The fourth proportional to 154,015.82, 212,641.80 and 137,855.12 is: 190,329.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,015.82 : 212,641.80 = 137,855.12 : x
  2. Step 2: Convert to fraction form
    154,015.82/212,641.80 = 137,855.12/x
  3. Step 3: Cross multiply
    154,015.82x = 212,641.80 × 137,855.12
  4. Step 4: Simplify right side
    154,015.82x = 29,313,760,856.02
  5. Step 5: Solve for x
    x = 29,313,760,856.02/154,015.82
  6. Step 6: Final answer
    x = 190,329.54

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1.5x scale

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.