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Finding the Fourth Proportional to 207,405.86, 311,173.38 and 74,287.28

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Solution

The fourth proportional to 207,405.86, 311,173.38 and 74,287.28 is: 111,454.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,405.86 : 311,173.38 = 74,287.28 : x
  2. Step 2: Convert to fraction form
    207,405.86/311,173.38 = 74,287.28/x
  3. Step 3: Cross multiply
    207,405.86x = 311,173.38 × 74,287.28
  4. Step 4: Simplify right side
    207,405.86x = 23,116,224,008.61
  5. Step 5: Solve for x
    x = 23,116,224,008.61/207,405.86
  6. Step 6: Final answer
    x = 111,454.05

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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.