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Finding the Fourth Proportional to 100,336.59, 138,470.72 and 55,624.59

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Solution

The fourth proportional to 100,336.59, 138,470.72 and 55,624.59 is: 76,765.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,336.59 : 138,470.72 = 55,624.59 : x
  2. Step 2: Convert to fraction form
    100,336.59/138,470.72 = 55,624.59/x
  3. Step 3: Cross multiply
    100,336.59x = 138,470.72 × 55,624.59
  4. Step 4: Simplify right side
    100,336.59x = 7,702,377,027.00
  5. Step 5: Solve for x
    x = 7,702,377,027.00/100,336.59
  6. Step 6: Final answer
    x = 76,765.39

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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.