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Finding the Fourth Proportional to 133,870.90, 201,003.18 and 55,138.90

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Solution

The fourth proportional to 133,870.90, 201,003.18 and 55,138.90 is: 82,789.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,870.90 : 201,003.18 = 55,138.90 : x
  2. Step 2: Convert to fraction form
    133,870.90/201,003.18 = 55,138.90/x
  3. Step 3: Cross multiply
    133,870.90x = 201,003.18 × 55,138.90
  4. Step 4: Simplify right side
    133,870.90x = 11,083,094,862.32
  5. Step 5: Solve for x
    x = 11,083,094,862.32/133,870.90
  6. Step 6: Final answer
    x = 82,789.42

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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.