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Finding the Fourth Proportional to 133,063.72, 183,631.92 and 72,638.32

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Solution

The fourth proportional to 133,063.72, 183,631.92 and 72,638.32 is: 100,243.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,063.72 : 183,631.92 = 72,638.32 : x
  2. Step 2: Convert to fraction form
    133,063.72/183,631.92 = 72,638.32/x
  3. Step 3: Cross multiply
    133,063.72x = 183,631.92 × 72,638.32
  4. Step 4: Simplify right side
    133,063.72x = 13,338,714,167.17
  5. Step 5: Solve for x
    x = 13,338,714,167.17/133,063.72
  6. Step 6: Final answer
    x = 100,243.06

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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.