Home / 221,025.68-305,007.24-135,128.52

Finding the Fourth Proportional to 221,025.68, 305,007.24 and 135,128.52

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Solution

The fourth proportional to 221,025.68, 305,007.24 and 135,128.52 is: 186,472.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,025.68 : 305,007.24 = 135,128.52 : x
  2. Step 2: Convert to fraction form
    221,025.68/305,007.24 = 135,128.52/x
  3. Step 3: Cross multiply
    221,025.68x = 305,007.24 × 135,128.52
  4. Step 4: Simplify right side
    221,025.68x = 41,215,176,930.48
  5. Step 5: Solve for x
    x = 41,215,176,930.48/221,025.68
  6. Step 6: Final answer
    x = 186,472.35

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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.