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Finding the Fourth Proportional to 103,721.80, 155,190.12 and 61,624.48

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Solution

The fourth proportional to 103,721.80, 155,190.12 and 61,624.48 is: 92,203.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,721.80 : 155,190.12 = 61,624.48 : x
  2. Step 2: Convert to fraction form
    103,721.80/155,190.12 = 61,624.48/x
  3. Step 3: Cross multiply
    103,721.80x = 155,190.12 × 61,624.48
  4. Step 4: Simplify right side
    103,721.80x = 9,563,510,446.14
  5. Step 5: Solve for x
    x = 9,563,510,446.14/103,721.80
  6. Step 6: Final answer
    x = 92,203.48

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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.