Home / 128,123.05-192,120.07-42,703.66

Finding the Fourth Proportional to 128,123.05, 192,120.07 and 42,703.66

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Solution

The fourth proportional to 128,123.05, 192,120.07 and 42,703.66 is: 64,033.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,123.05 : 192,120.07 = 42,703.66 : x
  2. Step 2: Convert to fraction form
    128,123.05/192,120.07 = 42,703.66/x
  3. Step 3: Cross multiply
    128,123.05x = 192,120.07 × 42,703.66
  4. Step 4: Simplify right side
    128,123.05x = 8,204,229,101.09
  5. Step 5: Solve for x
    x = 8,204,229,101.09/128,123.05
  6. Step 6: Final answer
    x = 64,033.98

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1.5x scale

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.