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Finding the Fourth Proportional to 108,687.52, 163,279.74 and 77,175.28

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Solution

The fourth proportional to 108,687.52, 163,279.74 and 77,175.28 is: 115,939.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,687.52 : 163,279.74 = 77,175.28 : x
  2. Step 2: Convert to fraction form
    108,687.52/163,279.74 = 77,175.28/x
  3. Step 3: Cross multiply
    108,687.52x = 163,279.74 × 77,175.28
  4. Step 4: Simplify right side
    108,687.52x = 12,601,158,836.43
  5. Step 5: Solve for x
    x = 12,601,158,836.43/108,687.52
  6. Step 6: Final answer
    x = 115,939.34

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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.