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Finding the Fourth Proportional to 186,869.80, 280,138.04 and 68,513.56

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Solution

The fourth proportional to 186,869.80, 280,138.04 and 68,513.56 is: 102,709.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,869.80 : 280,138.04 = 68,513.56 : x
  2. Step 2: Convert to fraction form
    186,869.80/280,138.04 = 68,513.56/x
  3. Step 3: Cross multiply
    186,869.80x = 280,138.04 × 68,513.56
  4. Step 4: Simplify right side
    186,869.80x = 19,193,254,411.82
  5. Step 5: Solve for x
    x = 19,193,254,411.82/186,869.80
  6. Step 6: Final answer
    x = 102,709.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.