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Finding the Fourth Proportional to 103,318.60, 154,977.90 and 90,196.60

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Solution

The fourth proportional to 103,318.60, 154,977.90 and 90,196.60 is: 135,294.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,318.60 : 154,977.90 = 90,196.60 : x
  2. Step 2: Convert to fraction form
    103,318.60/154,977.90 = 90,196.60/x
  3. Step 3: Cross multiply
    103,318.60x = 154,977.90 × 90,196.60
  4. Step 4: Simplify right side
    103,318.60x = 13,978,479,655.14
  5. Step 5: Solve for x
    x = 13,978,479,655.14/103,318.60
  6. Step 6: Final answer
    x = 135,294.90

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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.