Home / 138,813.81-191,563.12-75,151.61

Finding the Fourth Proportional to 138,813.81, 191,563.12 and 75,151.61

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Solution

The fourth proportional to 138,813.81, 191,563.12 and 75,151.61 is: 103,709.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,813.81 : 191,563.12 = 75,151.61 : x
  2. Step 2: Convert to fraction form
    138,813.81/191,563.12 = 75,151.61/x
  3. Step 3: Cross multiply
    138,813.81x = 191,563.12 × 75,151.61
  4. Step 4: Simplify right side
    138,813.81x = 14,396,276,884.62
  5. Step 5: Solve for x
    x = 14,396,276,884.62/138,813.81
  6. Step 6: Final answer
    x = 103,709.26

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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.