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Finding the Fourth Proportional to 100,609.76, 138,811.19 and 60,308.82

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Solution

The fourth proportional to 100,609.76, 138,811.19 and 60,308.82 is: 83,208.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,609.76 : 138,811.19 = 60,308.82 : x
  2. Step 2: Convert to fraction form
    100,609.76/138,811.19 = 60,308.82/x
  3. Step 3: Cross multiply
    100,609.76x = 138,811.19 × 60,308.82
  4. Step 4: Simplify right side
    100,609.76x = 8,371,538,551.15
  5. Step 5: Solve for x
    x = 8,371,538,551.15/100,609.76
  6. Step 6: Final answer
    x = 83,208.02

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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.