Home / 128,219.79-192,348.45-39,481.05

Finding the Fourth Proportional to 128,219.79, 192,348.45 and 39,481.05

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Solution

The fourth proportional to 128,219.79, 192,348.45 and 39,481.05 is: 59,227.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,219.79 : 192,348.45 = 39,481.05 : x
  2. Step 2: Convert to fraction form
    128,219.79/192,348.45 = 39,481.05/x
  3. Step 3: Cross multiply
    128,219.79x = 192,348.45 × 39,481.05
  4. Step 4: Simplify right side
    128,219.79x = 7,594,118,771.87
  5. Step 5: Solve for x
    x = 7,594,118,771.87/128,219.79
  6. Step 6: Final answer
    x = 59,227.35

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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.