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Finding the Fourth Proportional to 208,336.65, 312,620.80 and 101,721.91

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Solution

The fourth proportional to 208,336.65, 312,620.80 and 101,721.91 is: 152,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,336.65 : 312,620.80 = 101,721.91 : x
  2. Step 2: Convert to fraction form
    208,336.65/312,620.80 = 101,721.91/x
  3. Step 3: Cross multiply
    208,336.65x = 312,620.80 × 101,721.91
  4. Step 4: Simplify right side
    208,336.65x = 31,800,384,881.73
  5. Step 5: Solve for x
    x = 31,800,384,881.73/208,336.65
  6. Step 6: Final answer
    x = 152,639.42

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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.