Home / 221,219.40-305,306.19-135,228.72

Finding the Fourth Proportional to 221,219.40, 305,306.19 and 135,228.72

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Solution

The fourth proportional to 221,219.40, 305,306.19 and 135,228.72 is: 186,629.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,219.40 : 305,306.19 = 135,228.72 : x
  2. Step 2: Convert to fraction form
    221,219.40/305,306.19 = 135,228.72/x
  3. Step 3: Cross multiply
    221,219.40x = 305,306.19 × 135,228.72
  4. Step 4: Simplify right side
    221,219.40x = 41,286,163,470.32
  5. Step 5: Solve for x
    x = 41,286,163,470.32/221,219.40
  6. Step 6: Final answer
    x = 186,629.94

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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.