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Finding the Fourth Proportional to 221,295.75, 331,383.07 and 137,220.12

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Solution

The fourth proportional to 221,295.75, 331,383.07 and 137,220.12 is: 205,482.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,295.75 : 331,383.07 = 137,220.12 : x
  2. Step 2: Convert to fraction form
    221,295.75/331,383.07 = 137,220.12/x
  3. Step 3: Cross multiply
    221,295.75x = 331,383.07 × 137,220.12
  4. Step 4: Simplify right side
    221,295.75x = 45,472,424,256.81
  5. Step 5: Solve for x
    x = 45,472,424,256.81/221,295.75
  6. Step 6: Final answer
    x = 205,482.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.