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Finding the Fourth Proportional to 211,636.69, 317,558.82 and 99,326.04

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Solution

The fourth proportional to 211,636.69, 317,558.82 and 99,326.04 is: 149,037.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,636.69 : 317,558.82 = 99,326.04 : x
  2. Step 2: Convert to fraction form
    211,636.69/317,558.82 = 99,326.04/x
  3. Step 3: Cross multiply
    211,636.69x = 317,558.82 × 99,326.04
  4. Step 4: Simplify right side
    211,636.69x = 31,541,859,239.30
  5. Step 5: Solve for x
    x = 31,541,859,239.30/211,636.69
  6. Step 6: Final answer
    x = 149,037.77

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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.