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Finding the Fourth Proportional to 135,394.52, 186,785.62 and 81,649.67

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Solution

The fourth proportional to 135,394.52, 186,785.62 and 81,649.67 is: 112,641.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,394.52 : 186,785.62 = 81,649.67 : x
  2. Step 2: Convert to fraction form
    135,394.52/186,785.62 = 81,649.67/x
  3. Step 3: Cross multiply
    135,394.52x = 186,785.62 × 81,649.67
  4. Step 4: Simplify right side
    135,394.52x = 15,250,984,496.59
  5. Step 5: Solve for x
    x = 15,250,984,496.59/135,394.52
  6. Step 6: Final answer
    x = 112,641.07

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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.