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Finding the Fourth Proportional to 187,709.96, 281,506.06 and 61,321.40

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Solution

The fourth proportional to 187,709.96, 281,506.06 and 61,321.40 is: 91,962.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,709.96 : 281,506.06 = 61,321.40 : x
  2. Step 2: Convert to fraction form
    187,709.96/281,506.06 = 61,321.40/x
  3. Step 3: Cross multiply
    187,709.96x = 281,506.06 × 61,321.40
  4. Step 4: Simplify right side
    187,709.96x = 17,262,345,401.08
  5. Step 5: Solve for x
    x = 17,262,345,401.08/187,709.96
  6. Step 6: Final answer
    x = 91,962.87

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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.