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Finding the Fourth Proportional to 131,803.65, 197,836.70 and 72,667.17

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Solution

The fourth proportional to 131,803.65, 197,836.70 and 72,667.17 is: 109,073.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,803.65 : 197,836.70 = 72,667.17 : x
  2. Step 2: Convert to fraction form
    131,803.65/197,836.70 = 72,667.17/x
  3. Step 3: Cross multiply
    131,803.65x = 197,836.70 × 72,667.17
  4. Step 4: Simplify right side
    131,803.65x = 14,376,232,747.80
  5. Step 5: Solve for x
    x = 14,376,232,747.80/131,803.65
  6. Step 6: Final answer
    x = 109,073.10

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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.