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Finding the Fourth Proportional to 85,142.98, 127,604.76 and 79,828.48

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Solution

The fourth proportional to 85,142.98, 127,604.76 and 79,828.48 is: 119,639.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,142.98 : 127,604.76 = 79,828.48 : x
  2. Step 2: Convert to fraction form
    85,142.98/127,604.76 = 79,828.48/x
  3. Step 3: Cross multiply
    85,142.98x = 127,604.76 × 79,828.48
  4. Step 4: Simplify right side
    85,142.98x = 10,186,494,031.56
  5. Step 5: Solve for x
    x = 10,186,494,031.56/85,142.98
  6. Step 6: Final answer
    x = 119,639.86

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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.