Home / 221,256.31-305,223.15-139,685.65

Finding the Fourth Proportional to 221,256.31, 305,223.15 and 139,685.65

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Solution

The fourth proportional to 221,256.31, 305,223.15 and 139,685.65 is: 192,696.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,256.31 : 305,223.15 = 139,685.65 : x
  2. Step 2: Convert to fraction form
    221,256.31/305,223.15 = 139,685.65/x
  3. Step 3: Cross multiply
    221,256.31x = 305,223.15 × 139,685.65
  4. Step 4: Simplify right side
    221,256.31x = 42,635,293,863.56
  5. Step 5: Solve for x
    x = 42,635,293,863.56/221,256.31
  6. Step 6: Final answer
    x = 192,696.40

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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.