Home / 128,377.80-192,566.70-39,623.40

Finding the Fourth Proportional to 128,377.80, 192,566.70 and 39,623.40

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Solution

The fourth proportional to 128,377.80, 192,566.70 and 39,623.40 is: 59,435.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,377.80 : 192,566.70 = 39,623.40 : x
  2. Step 2: Convert to fraction form
    128,377.80/192,566.70 = 39,623.40/x
  3. Step 3: Cross multiply
    128,377.80x = 192,566.70 × 39,623.40
  4. Step 4: Simplify right side
    128,377.80x = 7,630,147,380.78
  5. Step 5: Solve for x
    x = 7,630,147,380.78/128,377.80
  6. Step 6: Final answer
    x = 59,435.10

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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.