Home / 142,936.31-197,247.53-78,404.63

Finding the Fourth Proportional to 142,936.31, 197,247.53 and 78,404.63

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Solution

The fourth proportional to 142,936.31, 197,247.53 and 78,404.63 is: 108,195.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,936.31 : 197,247.53 = 78,404.63 : x
  2. Step 2: Convert to fraction form
    142,936.31/197,247.53 = 78,404.63/x
  3. Step 3: Cross multiply
    142,936.31x = 197,247.53 × 78,404.63
  4. Step 4: Simplify right side
    142,936.31x = 15,465,118,229.80
  5. Step 5: Solve for x
    x = 15,465,118,229.80/142,936.31
  6. Step 6: Final answer
    x = 108,195.87

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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.