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Finding the Fourth Proportional to 206,666.10, 310,085.55 and 66,467.70

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Solution

The fourth proportional to 206,666.10, 310,085.55 and 66,467.70 is: 99,729.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,666.10 : 310,085.55 = 66,467.70 : x
  2. Step 2: Convert to fraction form
    206,666.10/310,085.55 = 66,467.70/x
  3. Step 3: Cross multiply
    206,666.10x = 310,085.55 × 66,467.70
  4. Step 4: Simplify right side
    206,666.10x = 20,610,673,311.74
  5. Step 5: Solve for x
    x = 20,610,673,311.74/206,666.10
  6. Step 6: Final answer
    x = 99,729.34

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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.