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Finding the Fourth Proportional to 111,843, 154,343.34 and 61,542

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Solution

The fourth proportional to 111,843, 154,343.34 and 61,542 is: 84,927.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,843 : 154,343.34 = 61,542 : x
  2. Step 2: Convert to fraction form
    111,843/154,343.34 = 61,542/x
  3. Step 3: Cross multiply
    111,843x = 154,343.34 × 61,542
  4. Step 4: Simplify right side
    111,843x = 9,498,597,830.28
  5. Step 5: Solve for x
    x = 9,498,597,830.28/111,843
  6. Step 6: Final answer
    x = 84,927.96

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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.