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Finding the Fourth Proportional to 136,199.82, 203,862.78 and 72,861.51

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Solution

The fourth proportional to 136,199.82, 203,862.78 and 72,861.51 is: 109,058.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,199.82 : 203,862.78 = 72,861.51 : x
  2. Step 2: Convert to fraction form
    136,199.82/203,862.78 = 72,861.51/x
  3. Step 3: Cross multiply
    136,199.82x = 203,862.78 × 72,861.51
  4. Step 4: Simplify right side
    136,199.82x = 14,853,749,983.60
  5. Step 5: Solve for x
    x = 14,853,749,983.60/136,199.82
  6. Step 6: Final answer
    x = 109,058.51

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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.