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Finding the Fourth Proportional to 115,175.60, 172,787.64 and 65,279.60

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Solution

The fourth proportional to 115,175.60, 172,787.64 and 65,279.60 is: 97,933.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,175.60 : 172,787.64 = 65,279.60 : x
  2. Step 2: Convert to fraction form
    115,175.60/172,787.64 = 65,279.60/x
  3. Step 3: Cross multiply
    115,175.60x = 172,787.64 × 65,279.60
  4. Step 4: Simplify right side
    115,175.60x = 11,279,508,024.14
  5. Step 5: Solve for x
    x = 11,279,508,024.14/115,175.60
  6. Step 6: Final answer
    x = 97,933.14

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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.