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Finding the Fourth Proportional to 207,447.22, 311,101.47 and 81,054.67

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Solution

The fourth proportional to 207,447.22, 311,101.47 and 81,054.67 is: 121,554.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,447.22 : 311,101.47 = 81,054.67 : x
  2. Step 2: Convert to fraction form
    207,447.22/311,101.47 = 81,054.67/x
  3. Step 3: Cross multiply
    207,447.22x = 311,101.47 × 81,054.67
  4. Step 4: Simplify right side
    207,447.22x = 25,216,226,987.36
  5. Step 5: Solve for x
    x = 25,216,226,987.36/207,447.22
  6. Step 6: Final answer
    x = 121,554.90

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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.