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Finding the Fourth Proportional to 128,699.66, 193,073.76 and 48,761.60

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Solution

The fourth proportional to 128,699.66, 193,073.76 and 48,761.60 is: 73,151.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,699.66 : 193,073.76 = 48,761.60 : x
  2. Step 2: Convert to fraction form
    128,699.66/193,073.76 = 48,761.60/x
  3. Step 3: Cross multiply
    128,699.66x = 193,073.76 × 48,761.60
  4. Step 4: Simplify right side
    128,699.66x = 9,414,585,455.62
  5. Step 5: Solve for x
    x = 9,414,585,455.62/128,699.66
  6. Step 6: Final answer
    x = 73,151.60

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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.