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Finding the Fourth Proportional to 187,988.87, 281,917.71 and 75,639.98

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Solution

The fourth proportional to 187,988.87, 281,917.71 and 75,639.98 is: 113,433.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,988.87 : 281,917.71 = 75,639.98 : x
  2. Step 2: Convert to fraction form
    187,988.87/281,917.71 = 75,639.98/x
  3. Step 3: Cross multiply
    187,988.87x = 281,917.71 × 75,639.98
  4. Step 4: Simplify right side
    187,988.87x = 21,324,248,536.46
  5. Step 5: Solve for x
    x = 21,324,248,536.46/187,988.87
  6. Step 6: Final answer
    x = 113,433.57

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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.