Home / 128,472.18-192,500.91-79,120.50

Finding the Fourth Proportional to 128,472.18, 192,500.91 and 79,120.50

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Solution

The fourth proportional to 128,472.18, 192,500.91 and 79,120.50 is: 118,553.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,472.18 : 192,500.91 = 79,120.50 : x
  2. Step 2: Convert to fraction form
    128,472.18/192,500.91 = 79,120.50/x
  3. Step 3: Cross multiply
    128,472.18x = 192,500.91 × 79,120.50
  4. Step 4: Simplify right side
    128,472.18x = 15,230,768,249.66
  5. Step 5: Solve for x
    x = 15,230,768,249.66/128,472.18
  6. Step 6: Final answer
    x = 118,553.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.