Home / 221,689.20-305,929.12-121,085.04

Finding the Fourth Proportional to 221,689.20, 305,929.12 and 121,085.04

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Solution

The fourth proportional to 221,689.20, 305,929.12 and 121,085.04 is: 167,096.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,689.20 : 305,929.12 = 121,085.04 : x
  2. Step 2: Convert to fraction form
    221,689.20/305,929.12 = 121,085.04/x
  3. Step 3: Cross multiply
    221,689.20x = 305,929.12 × 121,085.04
  4. Step 4: Simplify right side
    221,689.20x = 37,043,439,732.36
  5. Step 5: Solve for x
    x = 37,043,439,732.36/221,689.20
  6. Step 6: Final answer
    x = 167,096.28

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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.