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Finding the Fourth Proportional to 128,826.51, 193,042.70 and 68,863.52

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Solution

The fourth proportional to 128,826.51, 193,042.70 and 68,863.52 is: 103,189.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,826.51 : 193,042.70 = 68,863.52 : x
  2. Step 2: Convert to fraction form
    128,826.51/193,042.70 = 68,863.52/x
  3. Step 3: Cross multiply
    128,826.51x = 193,042.70 × 68,863.52
  4. Step 4: Simplify right side
    128,826.51x = 13,293,598,522.77
  5. Step 5: Solve for x
    x = 13,293,598,522.77/128,826.51
  6. Step 6: Final answer
    x = 103,189.93

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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.