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Finding the Fourth Proportional to 102,900.78, 154,369.53 and 36,379.53

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Solution

The fourth proportional to 102,900.78, 154,369.53 and 36,379.53 is: 54,575.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,900.78 : 154,369.53 = 36,379.53 : x
  2. Step 2: Convert to fraction form
    102,900.78/154,369.53 = 36,379.53/x
  3. Step 3: Cross multiply
    102,900.78x = 154,369.53 × 36,379.53
  4. Step 4: Simplify right side
    102,900.78x = 5,615,890,947.72
  5. Step 5: Solve for x
    x = 5,615,890,947.72/102,900.78
  6. Step 6: Final answer
    x = 54,575.79

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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.