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Finding the Fourth Proportional to 103,896.60, 155,844.90 and 90,774.60

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Solution

The fourth proportional to 103,896.60, 155,844.90 and 90,774.60 is: 136,161.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,896.60 : 155,844.90 = 90,774.60 : x
  2. Step 2: Convert to fraction form
    103,896.60/155,844.90 = 90,774.60/x
  3. Step 3: Cross multiply
    103,896.60x = 155,844.90 × 90,774.60
  4. Step 4: Simplify right side
    103,896.60x = 14,146,758,459.54
  5. Step 5: Solve for x
    x = 14,146,758,459.54/103,896.60
  6. Step 6: Final answer
    x = 136,161.90

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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.