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Finding the Fourth Proportional to 207,278.60, 310,917.90 and 74,150.78

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Solution

The fourth proportional to 207,278.60, 310,917.90 and 74,150.78 is: 111,226.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,278.60 : 310,917.90 = 74,150.78 : x
  2. Step 2: Convert to fraction form
    207,278.60/310,917.90 = 74,150.78/x
  3. Step 3: Cross multiply
    207,278.60x = 310,917.90 × 74,150.78
  4. Step 4: Simplify right side
    207,278.60x = 23,054,804,800.96
  5. Step 5: Solve for x
    x = 23,054,804,800.96/207,278.60
  6. Step 6: Final answer
    x = 111,226.17

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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.