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Finding the Fourth Proportional to 128,881.88, 193,261.47 and 52,968.56

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Solution

The fourth proportional to 128,881.88, 193,261.47 and 52,968.56 is: 79,427.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,881.88 : 193,261.47 = 52,968.56 : x
  2. Step 2: Convert to fraction form
    128,881.88/193,261.47 = 52,968.56/x
  3. Step 3: Cross multiply
    128,881.88x = 193,261.47 × 52,968.56
  4. Step 4: Simplify right side
    128,881.88x = 10,236,781,769.38
  5. Step 5: Solve for x
    x = 10,236,781,769.38/128,881.88
  6. Step 6: Final answer
    x = 79,427.63

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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.