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Finding the Fourth Proportional to 128,625.54, 193,004.10 and 61,233.72

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Solution

The fourth proportional to 128,625.54, 193,004.10 and 61,233.72 is: 91,881.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,625.54 : 193,004.10 = 61,233.72 : x
  2. Step 2: Convert to fraction form
    128,625.54/193,004.10 = 61,233.72/x
  3. Step 3: Cross multiply
    128,625.54x = 193,004.10 × 61,233.72
  4. Step 4: Simplify right side
    128,625.54x = 11,818,359,018.25
  5. Step 5: Solve for x
    x = 11,818,359,018.25/128,625.54
  6. Step 6: Final answer
    x = 91,881.90

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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.