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Finding the Fourth Proportional to 111,029.70, 166,544.55 and 77,787.30

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Solution

The fourth proportional to 111,029.70, 166,544.55 and 77,787.30 is: 116,680.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,029.70 : 166,544.55 = 77,787.30 : x
  2. Step 2: Convert to fraction form
    111,029.70/166,544.55 = 77,787.30/x
  3. Step 3: Cross multiply
    111,029.70x = 166,544.55 × 77,787.30
  4. Step 4: Simplify right side
    111,029.70x = 12,955,050,874.22
  5. Step 5: Solve for x
    x = 12,955,050,874.22/111,029.70
  6. Step 6: Final answer
    x = 116,680.95

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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.