Home / 142,948.89-197,269.11-78,418.44

Finding the Fourth Proportional to 142,948.89, 197,269.11 and 78,418.44

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Solution

The fourth proportional to 142,948.89, 197,269.11 and 78,418.44 is: 108,217.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,948.89 : 197,269.11 = 78,418.44 : x
  2. Step 2: Convert to fraction form
    142,948.89/197,269.11 = 78,418.44/x
  3. Step 3: Cross multiply
    142,948.89x = 197,269.11 × 78,418.44
  4. Step 4: Simplify right side
    142,948.89x = 15,469,535,866.39
  5. Step 5: Solve for x
    x = 15,469,535,866.39/142,948.89
  6. Step 6: Final answer
    x = 108,217.25

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1.5x scale

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.