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Finding the Fourth Proportional to 128,622.75, 192,934.24 and 53,702.06

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Solution

The fourth proportional to 128,622.75, 192,934.24 and 53,702.06 is: 80,553.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,622.75 : 192,934.24 = 53,702.06 : x
  2. Step 2: Convert to fraction form
    128,622.75/192,934.24 = 53,702.06/x
  3. Step 3: Cross multiply
    128,622.75x = 192,934.24 × 53,702.06
  4. Step 4: Simplify right side
    128,622.75x = 10,360,965,033.61
  5. Step 5: Solve for x
    x = 10,360,965,033.61/128,622.75
  6. Step 6: Final answer
    x = 80,553.13

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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.