Home / 142,851.20-197,121.40-79,183.58

Finding the Fourth Proportional to 142,851.20, 197,121.40 and 79,183.58

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Solution

The fourth proportional to 142,851.20, 197,121.40 and 79,183.58 is: 109,265.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,851.20 : 197,121.40 = 79,183.58 : x
  2. Step 2: Convert to fraction form
    142,851.20/197,121.40 = 79,183.58/x
  3. Step 3: Cross multiply
    142,851.20x = 197,121.40 × 79,183.58
  4. Step 4: Simplify right side
    142,851.20x = 15,608,778,146.61
  5. Step 5: Solve for x
    x = 15,608,778,146.61/142,851.20
  6. Step 6: Final answer
    x = 109,265.99

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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.