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Finding the Fourth Proportional to 79,274.45, 109,394.58 and 45,276.28

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Solution

The fourth proportional to 79,274.45, 109,394.58 and 45,276.28 is: 62,478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,274.45 : 109,394.58 = 45,276.28 : x
  2. Step 2: Convert to fraction form
    79,274.45/109,394.58 = 45,276.28/x
  3. Step 3: Cross multiply
    79,274.45x = 109,394.58 × 45,276.28
  4. Step 4: Simplify right side
    79,274.45x = 4,952,979,634.56
  5. Step 5: Solve for x
    x = 4,952,979,634.56/79,274.45
  6. Step 6: Final answer
    x = 62,478.89

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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.