Home / 185,503.20-278,408.40-85,816.80

Finding the Fourth Proportional to 185,503.20, 278,408.40 and 85,816.80

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Solution

The fourth proportional to 185,503.20, 278,408.40 and 85,816.80 is: 128,796.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,503.20 : 278,408.40 = 85,816.80 : x
  2. Step 2: Convert to fraction form
    185,503.20/278,408.40 = 85,816.80/x
  3. Step 3: Cross multiply
    185,503.20x = 278,408.40 × 85,816.80
  4. Step 4: Simplify right side
    185,503.20x = 23,892,117,981.12
  5. Step 5: Solve for x
    x = 23,892,117,981.12/185,503.20
  6. Step 6: Final answer
    x = 128,796.26

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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.