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Finding the Fourth Proportional to 136,750.40, 205,336.80 and 74,542.40

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Solution

The fourth proportional to 136,750.40, 205,336.80 and 74,542.40 is: 111,928.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,750.40 : 205,336.80 = 74,542.40 : x
  2. Step 2: Convert to fraction form
    136,750.40/205,336.80 = 74,542.40/x
  3. Step 3: Cross multiply
    136,750.40x = 205,336.80 × 74,542.40
  4. Step 4: Simplify right side
    136,750.40x = 15,306,297,880.32
  5. Step 5: Solve for x
    x = 15,306,297,880.32/136,750.40
  6. Step 6: Final answer
    x = 111,928.72

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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.