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Finding the Fourth Proportional to 221,373.31, 305,486.11 and 130,758.61

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Solution

The fourth proportional to 221,373.31, 305,486.11 and 130,758.61 is: 180,441.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,373.31 : 305,486.11 = 130,758.61 : x
  2. Step 2: Convert to fraction form
    221,373.31/305,486.11 = 130,758.61/x
  3. Step 3: Cross multiply
    221,373.31x = 305,486.11 × 130,758.61
  4. Step 4: Simplify right side
    221,373.31x = 39,944,938,517.64
  5. Step 5: Solve for x
    x = 39,944,938,517.64/221,373.31
  6. Step 6: Final answer
    x = 180,441.53

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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.