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Finding the Fourth Proportional to 187,051.56, 280,689.12 and 68,734.86

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Solution

The fourth proportional to 187,051.56, 280,689.12 and 68,734.86 is: 103,143.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,051.56 : 280,689.12 = 68,734.86 : x
  2. Step 2: Convert to fraction form
    187,051.56/280,689.12 = 68,734.86/x
  3. Step 3: Cross multiply
    187,051.56x = 280,689.12 × 68,734.86
  4. Step 4: Simplify right side
    187,051.56x = 19,293,126,056.38
  5. Step 5: Solve for x
    x = 19,293,126,056.38/187,051.56
  6. Step 6: Final answer
    x = 103,143.36

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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.