Home / 138,598.83-191,183.81-87,521.45

Finding the Fourth Proportional to 138,598.83, 191,183.81 and 87,521.45

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Solution

The fourth proportional to 138,598.83, 191,183.81 and 87,521.45 is: 120,727.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,598.83 : 191,183.81 = 87,521.45 : x
  2. Step 2: Convert to fraction form
    138,598.83/191,183.81 = 87,521.45/x
  3. Step 3: Cross multiply
    138,598.83x = 191,183.81 × 87,521.45
  4. Step 4: Simplify right side
    138,598.83x = 16,732,682,874.20
  5. Step 5: Solve for x
    x = 16,732,682,874.20/138,598.83
  6. Step 6: Final answer
    x = 120,727.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.