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Finding the Fourth Proportional to 81,063.72, 121,614.30 and 25,659.72

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Solution

The fourth proportional to 81,063.72, 121,614.30 and 25,659.72 is: 38,495.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,063.72 : 121,614.30 = 25,659.72 : x
  2. Step 2: Convert to fraction form
    81,063.72/121,614.30 = 25,659.72/x
  3. Step 3: Cross multiply
    81,063.72x = 121,614.30 × 25,659.72
  4. Step 4: Simplify right side
    81,063.72x = 3,120,588,886.00
  5. Step 5: Solve for x
    x = 3,120,588,886.00/81,063.72
  6. Step 6: Final answer
    x = 38,495.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.