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Finding the Fourth Proportional to 78,616, 117,956.16 and 34,219.84

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Solution

The fourth proportional to 78,616, 117,956.16 and 34,219.84 is: 51,343.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,616 : 117,956.16 = 34,219.84 : x
  2. Step 2: Convert to fraction form
    78,616/117,956.16 = 34,219.84/x
  3. Step 3: Cross multiply
    78,616x = 117,956.16 × 34,219.84
  4. Step 4: Simplify right side
    78,616x = 4,036,440,922.21
  5. Step 5: Solve for x
    x = 4,036,440,922.21/78,616
  6. Step 6: Final answer
    x = 51,343.76

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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.