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Finding the Fourth Proportional to 100,339.59, 138,474.86 and 55,627.59

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Solution

The fourth proportional to 100,339.59, 138,474.86 and 55,627.59 is: 76,769.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,339.59 : 138,474.86 = 55,627.59 : x
  2. Step 2: Convert to fraction form
    100,339.59/138,474.86 = 55,627.59/x
  3. Step 3: Cross multiply
    100,339.59x = 138,474.86 × 55,627.59
  4. Step 4: Simplify right side
    100,339.59x = 7,703,022,737.39
  5. Step 5: Solve for x
    x = 7,703,022,737.39/100,339.59
  6. Step 6: Final answer
    x = 76,769.53

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1.5x scale

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.