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Finding the Fourth Proportional to 207,955.66, 311,933.42 and 81,655.34

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Solution

The fourth proportional to 207,955.66, 311,933.42 and 81,655.34 is: 122,482.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,955.66 : 311,933.42 = 81,655.34 : x
  2. Step 2: Convert to fraction form
    207,955.66/311,933.42 = 81,655.34/x
  3. Step 3: Cross multiply
    207,955.66x = 311,933.42 × 81,655.34
  4. Step 4: Simplify right side
    207,955.66x = 25,471,029,467.46
  5. Step 5: Solve for x
    x = 25,471,029,467.46/207,955.66
  6. Step 6: Final answer
    x = 122,482.98

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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.