Home / 142,788.35-197,049.09-79,127.21

Finding the Fourth Proportional to 142,788.35, 197,049.09 and 79,127.21

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Solution

The fourth proportional to 142,788.35, 197,049.09 and 79,127.21 is: 109,196.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,788.35 : 197,049.09 = 79,127.21 : x
  2. Step 2: Convert to fraction form
    142,788.35/197,049.09 = 79,127.21/x
  3. Step 3: Cross multiply
    142,788.35x = 197,049.09 × 79,127.21
  4. Step 4: Simplify right side
    142,788.35x = 15,591,943,739.49
  5. Step 5: Solve for x
    x = 15,591,943,739.49/142,788.35
  6. Step 6: Final answer
    x = 109,196.19

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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.