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Finding the Fourth Proportional to 128,793.70, 192,643.80 and 115,562.35

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Solution

The fourth proportional to 128,793.70, 192,643.80 and 115,562.35 is: 172,852.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,793.70 : 192,643.80 = 115,562.35 : x
  2. Step 2: Convert to fraction form
    128,793.70/192,643.80 = 115,562.35/x
  3. Step 3: Cross multiply
    128,793.70x = 192,643.80 × 115,562.35
  4. Step 4: Simplify right side
    128,793.70x = 22,262,370,240.93
  5. Step 5: Solve for x
    x = 22,262,370,240.93/128,793.70
  6. Step 6: Final answer
    x = 172,852.94

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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.