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Finding the Fourth Proportional to 211,530.72, 317,194.72 and 122,808.72

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Solution

The fourth proportional to 211,530.72, 317,194.72 and 122,808.72 is: 184,154.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,530.72 : 317,194.72 = 122,808.72 : x
  2. Step 2: Convert to fraction form
    211,530.72/317,194.72 = 122,808.72/x
  3. Step 3: Cross multiply
    211,530.72x = 317,194.72 × 122,808.72
  4. Step 4: Simplify right side
    211,530.72x = 38,954,277,553.96
  5. Step 5: Solve for x
    x = 38,954,277,553.96/211,530.72
  6. Step 6: Final answer
    x = 184,154.23

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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.