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Finding the Fourth Proportional to 138,684.69, 191,384.78 and 75,022.54

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Solution

The fourth proportional to 138,684.69, 191,384.78 and 75,022.54 is: 103,531.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,684.69 : 191,384.78 = 75,022.54 : x
  2. Step 2: Convert to fraction form
    138,684.69/191,384.78 = 75,022.54/x
  3. Step 3: Cross multiply
    138,684.69x = 191,384.78 × 75,022.54
  4. Step 4: Simplify right side
    138,684.69x = 14,358,171,459.37
  5. Step 5: Solve for x
    x = 14,358,171,459.37/138,684.69
  6. Step 6: Final answer
    x = 103,531.05

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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.