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Finding the Fourth Proportional to 206,967.20, 310,450.80 and 136,108.40

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Solution

The fourth proportional to 206,967.20, 310,450.80 and 136,108.40 is: 204,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,967.20 : 310,450.80 = 136,108.40 : x
  2. Step 2: Convert to fraction form
    206,967.20/310,450.80 = 136,108.40/x
  3. Step 3: Cross multiply
    206,967.20x = 310,450.80 × 136,108.40
  4. Step 4: Simplify right side
    206,967.20x = 42,254,961,666.72
  5. Step 5: Solve for x
    x = 42,254,961,666.72/206,967.20
  6. Step 6: Final answer
    x = 204,162.60

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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.