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Finding the Fourth Proportional to 128,766.80, 193,128.60 and 35,250.32

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Solution

The fourth proportional to 128,766.80, 193,128.60 and 35,250.32 is: 52,869.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,766.80 : 193,128.60 = 35,250.32 : x
  2. Step 2: Convert to fraction form
    128,766.80/193,128.60 = 35,250.32/x
  3. Step 3: Cross multiply
    128,766.80x = 193,128.60 × 35,250.32
  4. Step 4: Simplify right side
    128,766.80x = 6,807,844,951.15
  5. Step 5: Solve for x
    x = 6,807,844,951.15/128,766.80
  6. Step 6: Final answer
    x = 52,869.57

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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.