Home / 185,665.20-278,018.17-128,139.96

Finding the Fourth Proportional to 185,665.20, 278,018.17 and 128,139.96

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Solution

The fourth proportional to 185,665.20, 278,018.17 and 128,139.96 is: 191,878.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,665.20 : 278,018.17 = 128,139.96 : x
  2. Step 2: Convert to fraction form
    185,665.20/278,018.17 = 128,139.96/x
  3. Step 3: Cross multiply
    185,665.20x = 278,018.17 × 128,139.96
  4. Step 4: Simplify right side
    185,665.20x = 35,625,235,472.63
  5. Step 5: Solve for x
    x = 35,625,235,472.63/185,665.20
  6. Step 6: Final answer
    x = 191,878.90

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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.