Home / 428,747.58-643,121.37-148,111.74

Finding the Fourth Proportional to 428,747.58, 643,121.37 and 148,111.74

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Solution

The fourth proportional to 428,747.58, 643,121.37 and 148,111.74 is: 222,167.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,747.58 : 643,121.37 = 148,111.74 : x
  2. Step 2: Convert to fraction form
    428,747.58/643,121.37 = 148,111.74/x
  3. Step 3: Cross multiply
    428,747.58x = 643,121.37 × 148,111.74
  4. Step 4: Simplify right side
    428,747.58x = 95,253,825,141.88
  5. Step 5: Solve for x
    x = 95,253,825,141.88/428,747.58
  6. Step 6: Final answer
    x = 222,167.61

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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.