Home / 143,023.11-197,377.59-78,494.61

Finding the Fourth Proportional to 143,023.11, 197,377.59 and 78,494.61

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Solution

The fourth proportional to 143,023.11, 197,377.59 and 78,494.61 is: 108,325.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,023.11 : 197,377.59 = 78,494.61 : x
  2. Step 2: Convert to fraction form
    143,023.11/197,377.59 = 78,494.61/x
  3. Step 3: Cross multiply
    143,023.11x = 197,377.59 × 78,494.61
  4. Step 4: Simplify right side
    143,023.11x = 15,493,076,949.79
  5. Step 5: Solve for x
    x = 15,493,076,949.79/143,023.11
  6. Step 6: Final answer
    x = 108,325.69

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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.