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Finding the Fourth Proportional to 207,285.12, 310,917.60 and 67,040.64

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Solution

The fourth proportional to 207,285.12, 310,917.60 and 67,040.64 is: 100,557.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,285.12 : 310,917.60 = 67,040.64 : x
  2. Step 2: Convert to fraction form
    207,285.12/310,917.60 = 67,040.64/x
  3. Step 3: Cross multiply
    207,285.12x = 310,917.60 × 67,040.64
  4. Step 4: Simplify right side
    207,285.12x = 20,844,114,891.26
  5. Step 5: Solve for x
    x = 20,844,114,891.26/207,285.12
  6. Step 6: Final answer
    x = 100,557.70

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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.