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Finding the Fourth Proportional to 207,645.08, 311,493.54 and 81,268.98

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Solution

The fourth proportional to 207,645.08, 311,493.54 and 81,268.98 is: 121,913.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,645.08 : 311,493.54 = 81,268.98 : x
  2. Step 2: Convert to fraction form
    207,645.08/311,493.54 = 81,268.98/x
  3. Step 3: Cross multiply
    207,645.08x = 311,493.54 × 81,268.98
  4. Step 4: Simplify right side
    207,645.08x = 25,314,762,272.39
  5. Step 5: Solve for x
    x = 25,314,762,272.39/207,645.08
  6. Step 6: Final answer
    x = 121,913.62

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1.5x scale

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.