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Finding the Fourth Proportional to 211,550.08, 317,636.16 and 87,134.08

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Solution

The fourth proportional to 211,550.08, 317,636.16 and 87,134.08 is: 130,829.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,550.08 : 317,636.16 = 87,134.08 : x
  2. Step 2: Convert to fraction form
    211,550.08/317,636.16 = 87,134.08/x
  3. Step 3: Cross multiply
    211,550.08x = 317,636.16 × 87,134.08
  4. Step 4: Simplify right side
    211,550.08x = 27,676,934,576.33
  5. Step 5: Solve for x
    x = 27,676,934,576.33/211,550.08
  6. Step 6: Final answer
    x = 130,829.23

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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.