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Finding the Fourth Proportional to 111,776.60, 154,252.74 and 60,789.81

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Solution

The fourth proportional to 111,776.60, 154,252.74 and 60,789.81 is: 83,890.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,776.60 : 154,252.74 = 60,789.81 : x
  2. Step 2: Convert to fraction form
    111,776.60/154,252.74 = 60,789.81/x
  3. Step 3: Cross multiply
    111,776.60x = 154,252.74 × 60,789.81
  4. Step 4: Simplify right side
    111,776.60x = 9,376,994,756.58
  5. Step 5: Solve for x
    x = 9,376,994,756.58/111,776.60
  6. Step 6: Final answer
    x = 83,890.50

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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.