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Finding the Fourth Proportional to 101,614.91, 139,900.97 and 87,246.32

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Solution

The fourth proportional to 101,614.91, 139,900.97 and 87,246.32 is: 120,118.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,614.91 : 139,900.97 = 87,246.32 : x
  2. Step 2: Convert to fraction form
    101,614.91/139,900.97 = 87,246.32/x
  3. Step 3: Cross multiply
    101,614.91x = 139,900.97 × 87,246.32
  4. Step 4: Simplify right side
    101,614.91x = 12,205,844,315.54
  5. Step 5: Solve for x
    x = 12,205,844,315.54/101,614.91
  6. Step 6: Final answer
    x = 120,118.64

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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.