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Finding the Fourth Proportional to 211,609.71, 317,381.75 and 61,809.77

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Solution

The fourth proportional to 211,609.71, 317,381.75 and 61,809.77 is: 92,705.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,609.71 : 317,381.75 = 61,809.77 : x
  2. Step 2: Convert to fraction form
    211,609.71/317,381.75 = 61,809.77/x
  3. Step 3: Cross multiply
    211,609.71x = 317,381.75 × 61,809.77
  4. Step 4: Simplify right side
    211,609.71x = 19,617,291,073.74
  5. Step 5: Solve for x
    x = 19,617,291,073.74/211,609.71
  6. Step 6: Final answer
    x = 92,705.06

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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.