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Finding the Fourth Proportional to 79,290.48, 109,419.96 and 45,755.76

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Solution

The fourth proportional to 79,290.48, 109,419.96 and 45,755.76 is: 63,142.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,290.48 : 109,419.96 = 45,755.76 : x
  2. Step 2: Convert to fraction form
    79,290.48/109,419.96 = 45,755.76/x
  3. Step 3: Cross multiply
    79,290.48x = 109,419.96 × 45,755.76
  4. Step 4: Simplify right side
    79,290.48x = 5,006,593,428.97
  5. Step 5: Solve for x
    x = 5,006,593,428.97/79,290.48
  6. Step 6: Final answer
    x = 63,142.43

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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.