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Finding the Fourth Proportional to 71,310.84, 98,410.41 and 42,660.06

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Solution

The fourth proportional to 71,310.84, 98,410.41 and 42,660.06 is: 58,871.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,310.84 : 98,410.41 = 42,660.06 : x
  2. Step 2: Convert to fraction form
    71,310.84/98,410.41 = 42,660.06/x
  3. Step 3: Cross multiply
    71,310.84x = 98,410.41 × 42,660.06
  4. Step 4: Simplify right side
    71,310.84x = 4,198,193,995.22
  5. Step 5: Solve for x
    x = 4,198,193,995.22/71,310.84
  6. Step 6: Final answer
    x = 58,871.75

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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.