Home / 188,125.20-281,750.40-128,638.80

Finding the Fourth Proportional to 188,125.20, 281,750.40 and 128,638.80

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Solution

The fourth proportional to 188,125.20, 281,750.40 and 128,638.80 is: 192,659.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,125.20 : 281,750.40 = 128,638.80 : x
  2. Step 2: Convert to fraction form
    188,125.20/281,750.40 = 128,638.80/x
  3. Step 3: Cross multiply
    188,125.20x = 281,750.40 × 128,638.80
  4. Step 4: Simplify right side
    188,125.20x = 36,244,033,355.52
  5. Step 5: Solve for x
    x = 36,244,033,355.52/188,125.20
  6. Step 6: Final answer
    x = 192,659.11

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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.