Home / 142,788.72-197,049.60-79,127.58

Finding the Fourth Proportional to 142,788.72, 197,049.60 and 79,127.58

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Solution

The fourth proportional to 142,788.72, 197,049.60 and 79,127.58 is: 109,196.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,788.72 : 197,049.60 = 79,127.58 : x
  2. Step 2: Convert to fraction form
    142,788.72/197,049.60 = 79,127.58/x
  3. Step 3: Cross multiply
    142,788.72x = 197,049.60 × 79,127.58
  4. Step 4: Simplify right side
    142,788.72x = 15,592,057,987.97
  5. Step 5: Solve for x
    x = 15,592,057,987.97/142,788.72
  6. Step 6: Final answer
    x = 109,196.71

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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.