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Finding the Fourth Proportional to 135,508.52, 187,008.72 and 81,792.80

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Solution

The fourth proportional to 135,508.52, 187,008.72 and 81,792.80 is: 112,878.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,508.52 : 187,008.72 = 81,792.80 : x
  2. Step 2: Convert to fraction form
    135,508.52/187,008.72 = 81,792.80/x
  3. Step 3: Cross multiply
    135,508.52x = 187,008.72 × 81,792.80
  4. Step 4: Simplify right side
    135,508.52x = 15,295,966,833.22
  5. Step 5: Solve for x
    x = 15,295,966,833.22/135,508.52
  6. Step 6: Final answer
    x = 112,878.27

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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.