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Finding the Fourth Proportional to 261,052.76, 391,606.47 and 111,308.87

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Solution

The fourth proportional to 261,052.76, 391,606.47 and 111,308.87 is: 166,974.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,052.76 : 391,606.47 = 111,308.87 : x
  2. Step 2: Convert to fraction form
    261,052.76/391,606.47 = 111,308.87/x
  3. Step 3: Cross multiply
    261,052.76x = 391,606.47 × 111,308.87
  4. Step 4: Simplify right side
    261,052.76x = 43,589,271,702.36
  5. Step 5: Solve for x
    x = 43,589,271,702.36/261,052.76
  6. Step 6: Final answer
    x = 166,974.95

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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.