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Finding the Fourth Proportional to 211,520.92, 317,291.92 and 69,380.52

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Solution

The fourth proportional to 211,520.92, 317,291.92 and 69,380.52 is: 104,074.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,520.92 : 317,291.92 = 69,380.52 : x
  2. Step 2: Convert to fraction form
    211,520.92/317,291.92 = 69,380.52/x
  3. Step 3: Cross multiply
    211,520.92x = 317,291.92 × 69,380.52
  4. Step 4: Simplify right side
    211,520.92x = 22,013,878,401.40
  5. Step 5: Solve for x
    x = 22,013,878,401.40/211,520.92
  6. Step 6: Final answer
    x = 104,074.24

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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.