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Finding the Fourth Proportional to 131,661.70, 197,492.55 and 80,923.30

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Solution

The fourth proportional to 131,661.70, 197,492.55 and 80,923.30 is: 121,384.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,661.70 : 197,492.55 = 80,923.30 : x
  2. Step 2: Convert to fraction form
    131,661.70/197,492.55 = 80,923.30/x
  3. Step 3: Cross multiply
    131,661.70x = 197,492.55 × 80,923.30
  4. Step 4: Simplify right side
    131,661.70x = 15,981,748,871.42
  5. Step 5: Solve for x
    x = 15,981,748,871.42/131,661.70
  6. Step 6: Final answer
    x = 121,384.95

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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.