Home / 185,403.78-278,007.18-85,512.54

Finding the Fourth Proportional to 185,403.78, 278,007.18 and 85,512.54

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Solution

The fourth proportional to 185,403.78, 278,007.18 and 85,512.54 is: 128,223.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,403.78 : 278,007.18 = 85,512.54 : x
  2. Step 2: Convert to fraction form
    185,403.78/278,007.18 = 85,512.54/x
  3. Step 3: Cross multiply
    185,403.78x = 278,007.18 × 85,512.54
  4. Step 4: Simplify right side
    185,403.78x = 23,773,100,100.04
  5. Step 5: Solve for x
    x = 23,773,100,100.04/185,403.78
  6. Step 6: Final answer
    x = 128,223.38

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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.