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Finding the Fourth Proportional to 103,832.76, 155,872.53 and 87,397.32

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Solution

The fourth proportional to 103,832.76, 155,872.53 and 87,397.32 is: 131,199.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,832.76 : 155,872.53 = 87,397.32 : x
  2. Step 2: Convert to fraction form
    103,832.76/155,872.53 = 87,397.32/x
  3. Step 3: Cross multiply
    103,832.76x = 155,872.53 × 87,397.32
  4. Step 4: Simplify right side
    103,832.76x = 13,622,841,383.62
  5. Step 5: Solve for x
    x = 13,622,841,383.62/103,832.76
  6. Step 6: Final answer
    x = 131,199.84

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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.