Home / 139,073.08-191,849.88-87,999.76

Finding the Fourth Proportional to 139,073.08, 191,849.88 and 87,999.76

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Solution

The fourth proportional to 139,073.08, 191,849.88 and 87,999.76 is: 121,394.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,073.08 : 191,849.88 = 87,999.76 : x
  2. Step 2: Convert to fraction form
    139,073.08/191,849.88 = 87,999.76/x
  3. Step 3: Cross multiply
    139,073.08x = 191,849.88 × 87,999.76
  4. Step 4: Simplify right side
    139,073.08x = 16,882,743,396.03
  5. Step 5: Solve for x
    x = 16,882,743,396.03/139,073.08
  6. Step 6: Final answer
    x = 121,394.76

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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.