Home / 135,909.72-203,825.70-42,390.36

Finding the Fourth Proportional to 135,909.72, 203,825.70 and 42,390.36

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Solution

The fourth proportional to 135,909.72, 203,825.70 and 42,390.36 is: 63,573.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,909.72 : 203,825.70 = 42,390.36 : x
  2. Step 2: Convert to fraction form
    135,909.72/203,825.70 = 42,390.36/x
  3. Step 3: Cross multiply
    135,909.72x = 203,825.70 × 42,390.36
  4. Step 4: Simplify right side
    135,909.72x = 8,640,244,800.25
  5. Step 5: Solve for x
    x = 8,640,244,800.25/135,909.72
  6. Step 6: Final answer
    x = 63,573.41

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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.