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Finding the Fourth Proportional to 128,796.66, 193,157.55 and 49,893.30

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Solution

The fourth proportional to 128,796.66, 193,157.55 and 49,893.30 is: 74,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,796.66 : 193,157.55 = 49,893.30 : x
  2. Step 2: Convert to fraction form
    128,796.66/193,157.55 = 49,893.30/x
  3. Step 3: Cross multiply
    128,796.66x = 193,157.55 × 49,893.30
  4. Step 4: Simplify right side
    128,796.66x = 9,637,267,589.42
  5. Step 5: Solve for x
    x = 9,637,267,589.42/128,796.66
  6. Step 6: Final answer
    x = 74,825.45

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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.