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Finding the Fourth Proportional to 71,287.82, 98,370.50 and 42,601.76

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Solution

The fourth proportional to 71,287.82, 98,370.50 and 42,601.76 is: 58,786.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,287.82 : 98,370.50 = 42,601.76 : x
  2. Step 2: Convert to fraction form
    71,287.82/98,370.50 = 42,601.76/x
  3. Step 3: Cross multiply
    71,287.82x = 98,370.50 × 42,601.76
  4. Step 4: Simplify right side
    71,287.82x = 4,190,756,432.08
  5. Step 5: Solve for x
    x = 4,190,756,432.08/71,287.82
  6. Step 6: Final answer
    x = 58,786.43

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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.