Home / 85,440.20-128,160.30-35,503.70

Finding the Fourth Proportional to 85,440.20, 128,160.30 and 35,503.70

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Solution

The fourth proportional to 85,440.20, 128,160.30 and 35,503.70 is: 53,255.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,440.20 : 128,160.30 = 35,503.70 : x
  2. Step 2: Convert to fraction form
    85,440.20/128,160.30 = 35,503.70/x
  3. Step 3: Cross multiply
    85,440.20x = 128,160.30 × 35,503.70
  4. Step 4: Simplify right side
    85,440.20x = 4,550,164,843.11
  5. Step 5: Solve for x
    x = 4,550,164,843.11/85,440.20
  6. Step 6: Final answer
    x = 53,255.55

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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.