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Finding the Fourth Proportional to 100,242.96, 138,310.92 and 55,530.96

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Solution

The fourth proportional to 100,242.96, 138,310.92 and 55,530.96 is: 76,619.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,242.96 : 138,310.92 = 55,530.96 : x
  2. Step 2: Convert to fraction form
    100,242.96/138,310.92 = 55,530.96/x
  3. Step 3: Cross multiply
    100,242.96x = 138,310.92 × 55,530.96
  4. Step 4: Simplify right side
    100,242.96x = 7,680,538,166.08
  5. Step 5: Solve for x
    x = 7,680,538,166.08/100,242.96
  6. Step 6: Final answer
    x = 76,619.23

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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.