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Finding the Fourth Proportional to 135,248.87, 186,650.26 and 81,551.21

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Solution

The fourth proportional to 135,248.87, 186,650.26 and 81,551.21 is: 112,544.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,248.87 : 186,650.26 = 81,551.21 : x
  2. Step 2: Convert to fraction form
    135,248.87/186,650.26 = 81,551.21/x
  3. Step 3: Cross multiply
    135,248.87x = 186,650.26 × 81,551.21
  4. Step 4: Simplify right side
    135,248.87x = 15,221,553,412.69
  5. Step 5: Solve for x
    x = 15,221,553,412.69/135,248.87
  6. Step 6: Final answer
    x = 112,544.77

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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.