Home / 128,414.40-192,640.08-39,675.72

Finding the Fourth Proportional to 128,414.40, 192,640.08 and 39,675.72

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Solution

The fourth proportional to 128,414.40, 192,640.08 and 39,675.72 is: 59,519.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,414.40 : 192,640.08 = 39,675.72 : x
  2. Step 2: Convert to fraction form
    128,414.40/192,640.08 = 39,675.72/x
  3. Step 3: Cross multiply
    128,414.40x = 192,640.08 × 39,675.72
  4. Step 4: Simplify right side
    128,414.40x = 7,643,133,874.86
  5. Step 5: Solve for x
    x = 7,643,133,874.86/128,414.40
  6. Step 6: Final answer
    x = 59,519.29

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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.