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Finding the Fourth Proportional to 103,615.80, 155,193.30 and 89,791.80

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Solution

The fourth proportional to 103,615.80, 155,193.30 and 89,791.80 is: 134,488.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.80 : 155,193.30 = 89,791.80 : x
  2. Step 2: Convert to fraction form
    103,615.80/155,193.30 = 89,791.80/x
  3. Step 3: Cross multiply
    103,615.80x = 155,193.30 × 89,791.80
  4. Step 4: Simplify right side
    103,615.80x = 13,935,085,754.94
  5. Step 5: Solve for x
    x = 13,935,085,754.94/103,615.80
  6. Step 6: Final answer
    x = 134,488.04

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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.