Home / 138,610.19-191,311.71-87,590.45

Finding the Fourth Proportional to 138,610.19, 191,311.71 and 87,590.45

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Solution

The fourth proportional to 138,610.19, 191,311.71 and 87,590.45 is: 120,893.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,610.19 : 191,311.71 = 87,590.45 : x
  2. Step 2: Convert to fraction form
    138,610.19/191,311.71 = 87,590.45/x
  3. Step 3: Cross multiply
    138,610.19x = 191,311.71 × 87,590.45
  4. Step 4: Simplify right side
    138,610.19x = 16,757,078,769.17
  5. Step 5: Solve for x
    x = 16,757,078,769.17/138,610.19
  6. Step 6: Final answer
    x = 120,893.56

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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.