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Finding the Fourth Proportional to 217,849.40, 326,730.90 and 105,529.40

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Solution

The fourth proportional to 217,849.40, 326,730.90 and 105,529.40 is: 158,273.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,849.40 : 326,730.90 = 105,529.40 : x
  2. Step 2: Convert to fraction form
    217,849.40/326,730.90 = 105,529.40/x
  3. Step 3: Cross multiply
    217,849.40x = 326,730.90 × 105,529.40
  4. Step 4: Simplify right side
    217,849.40x = 34,479,715,838.46
  5. Step 5: Solve for x
    x = 34,479,715,838.46/217,849.40
  6. Step 6: Final answer
    x = 158,273.17

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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.