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Finding the Fourth Proportional to 136,792.48, 188,774.40 and 80,204.80

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Solution

The fourth proportional to 136,792.48, 188,774.40 and 80,204.80 is: 110,683.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,792.48 : 188,774.40 = 80,204.80 : x
  2. Step 2: Convert to fraction form
    136,792.48/188,774.40 = 80,204.80/x
  3. Step 3: Cross multiply
    136,792.48x = 188,774.40 × 80,204.80
  4. Step 4: Simplify right side
    136,792.48x = 15,140,612,997.12
  5. Step 5: Solve for x
    x = 15,140,612,997.12/136,792.48
  6. Step 6: Final answer
    x = 110,683.08

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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.