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Finding the Fourth Proportional to 207,553.20, 311,428.21 and 123,479.45

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Solution

The fourth proportional to 207,553.20, 311,428.21 and 123,479.45 is: 185,277.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,553.20 : 311,428.21 = 123,479.45 : x
  2. Step 2: Convert to fraction form
    207,553.20/311,428.21 = 123,479.45/x
  3. Step 3: Cross multiply
    207,553.20x = 311,428.21 × 123,479.45
  4. Step 4: Simplify right side
    207,553.20x = 38,454,984,085.28
  5. Step 5: Solve for x
    x = 38,454,984,085.28/207,553.20
  6. Step 6: Final answer
    x = 185,277.72

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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.