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Finding the Fourth Proportional to 207,047.22, 310,964.48 and 128,708.88

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Solution

The fourth proportional to 207,047.22, 310,964.48 and 128,708.88 is: 193,308.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,047.22 : 310,964.48 = 128,708.88 : x
  2. Step 2: Convert to fraction form
    207,047.22/310,964.48 = 128,708.88/x
  3. Step 3: Cross multiply
    207,047.22x = 310,964.48 × 128,708.88
  4. Step 4: Simplify right side
    207,047.22x = 40,023,889,940.58
  5. Step 5: Solve for x
    x = 40,023,889,940.58/207,047.22
  6. Step 6: Final answer
    x = 193,308.03

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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.