Home / 221,719.68-305,972.64-121,118.40

Finding the Fourth Proportional to 221,719.68, 305,972.64 and 121,118.40

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Solution

The fourth proportional to 221,719.68, 305,972.64 and 121,118.40 is: 167,143.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,719.68 : 305,972.64 = 121,118.40 : x
  2. Step 2: Convert to fraction form
    221,719.68/305,972.64 = 121,118.40/x
  3. Step 3: Cross multiply
    221,719.68x = 305,972.64 × 121,118.40
  4. Step 4: Simplify right side
    221,719.68x = 37,058,916,600.58
  5. Step 5: Solve for x
    x = 37,058,916,600.58/221,719.68
  6. Step 6: Final answer
    x = 167,143.11

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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.