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Finding the Fourth Proportional to 79,486.40, 109,701.60 and 51,274.10

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Solution

The fourth proportional to 79,486.40, 109,701.60 and 51,274.10 is: 70,764.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,486.40 : 109,701.60 = 51,274.10 : x
  2. Step 2: Convert to fraction form
    79,486.40/109,701.60 = 51,274.10/x
  3. Step 3: Cross multiply
    79,486.40x = 109,701.60 × 51,274.10
  4. Step 4: Simplify right side
    79,486.40x = 5,624,850,808.56
  5. Step 5: Solve for x
    x = 5,624,850,808.56/79,486.40
  6. Step 6: Final answer
    x = 70,764.95

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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.