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Finding the Fourth Proportional to 211,530.20, 317,813.70 and 159,042.20

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Solution

The fourth proportional to 211,530.20, 317,813.70 and 159,042.20 is: 238,953.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,530.20 : 317,813.70 = 159,042.20 : x
  2. Step 2: Convert to fraction form
    211,530.20/317,813.70 = 159,042.20/x
  3. Step 3: Cross multiply
    211,530.20x = 317,813.70 × 159,042.20
  4. Step 4: Simplify right side
    211,530.20x = 50,545,790,038.14
  5. Step 5: Solve for x
    x = 50,545,790,038.14/211,530.20
  6. Step 6: Final answer
    x = 238,953.07

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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.