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Finding the Fourth Proportional to 131,838.44, 197,787.02 and 72,643.64

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Solution

The fourth proportional to 131,838.44, 197,787.02 and 72,643.64 is: 108,981.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,838.44 : 197,787.02 = 72,643.64 : x
  2. Step 2: Convert to fraction form
    131,838.44/197,787.02 = 72,643.64/x
  3. Step 3: Cross multiply
    131,838.44x = 197,787.02 × 72,643.64
  4. Step 4: Simplify right side
    131,838.44x = 14,367,967,725.40
  5. Step 5: Solve for x
    x = 14,367,967,725.40/131,838.44
  6. Step 6: Final answer
    x = 108,981.63

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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.