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Finding the Fourth Proportional to 144,960.80, 217,441.20 and 91,816.70

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Solution

The fourth proportional to 144,960.80, 217,441.20 and 91,816.70 is: 137,725.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,960.80 : 217,441.20 = 91,816.70 : x
  2. Step 2: Convert to fraction form
    144,960.80/217,441.20 = 91,816.70/x
  3. Step 3: Cross multiply
    144,960.80x = 217,441.20 × 91,816.70
  4. Step 4: Simplify right side
    144,960.80x = 19,964,733,428.04
  5. Step 5: Solve for x
    x = 19,964,733,428.04/144,960.80
  6. Step 6: Final answer
    x = 137,725.05

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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.