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Finding the Fourth Proportional to 137,043.40, 205,622.70 and 74,758.60

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Solution

The fourth proportional to 137,043.40, 205,622.70 and 74,758.60 is: 112,169.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,043.40 : 205,622.70 = 74,758.60 : x
  2. Step 2: Convert to fraction form
    137,043.40/205,622.70 = 74,758.60/x
  3. Step 3: Cross multiply
    137,043.40x = 205,622.70 × 74,758.60
  4. Step 4: Simplify right side
    137,043.40x = 15,372,065,180.22
  5. Step 5: Solve for x
    x = 15,372,065,180.22/137,043.40
  6. Step 6: Final answer
    x = 112,169.32

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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.