Home / 221,428.71-305,483.67-136,398.15

Finding the Fourth Proportional to 221,428.71, 305,483.67 and 136,398.15

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Solution

The fourth proportional to 221,428.71, 305,483.67 and 136,398.15 is: 188,175.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,428.71 : 305,483.67 = 136,398.15 : x
  2. Step 2: Convert to fraction form
    221,428.71/305,483.67 = 136,398.15/x
  3. Step 3: Cross multiply
    221,428.71x = 305,483.67 × 136,398.15
  4. Step 4: Simplify right side
    221,428.71x = 41,667,407,443.21
  5. Step 5: Solve for x
    x = 41,667,407,443.21/221,428.71
  6. Step 6: Final answer
    x = 188,175.27

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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.