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Finding the Fourth Proportional to 207,321.10, 310,784.62 and 81,042.30

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Solution

The fourth proportional to 207,321.10, 310,784.62 and 81,042.30 is: 121,486.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,321.10 : 310,784.62 = 81,042.30 : x
  2. Step 2: Convert to fraction form
    207,321.10/310,784.62 = 81,042.30/x
  3. Step 3: Cross multiply
    207,321.10x = 310,784.62 × 81,042.30
  4. Step 4: Simplify right side
    207,321.10x = 25,186,700,409.43
  5. Step 5: Solve for x
    x = 25,186,700,409.43/207,321.10
  6. Step 6: Final answer
    x = 121,486.43

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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.