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Finding the Fourth Proportional to 211,809.74, 317,647.31 and 69,622.20

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Solution

The fourth proportional to 211,809.74, 317,647.31 and 69,622.20 is: 104,411.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,809.74 : 317,647.31 = 69,622.20 : x
  2. Step 2: Convert to fraction form
    211,809.74/317,647.31 = 69,622.20/x
  3. Step 3: Cross multiply
    211,809.74x = 317,647.31 × 69,622.20
  4. Step 4: Simplify right side
    211,809.74x = 22,115,304,198.17
  5. Step 5: Solve for x
    x = 22,115,304,198.17/211,809.74
  6. Step 6: Final answer
    x = 104,411.18

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1.5x scale

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.