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Finding the Fourth Proportional to 207,078.77, 310,618.16 and 66,858.05

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Solution

The fourth proportional to 207,078.77, 310,618.16 and 66,858.05 is: 100,287.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,078.77 : 310,618.16 = 66,858.05 : x
  2. Step 2: Convert to fraction form
    207,078.77/310,618.16 = 66,858.05/x
  3. Step 3: Cross multiply
    207,078.77x = 310,618.16 × 66,858.05
  4. Step 4: Simplify right side
    207,078.77x = 20,767,322,584.81
  5. Step 5: Solve for x
    x = 20,767,322,584.81/207,078.77
  6. Step 6: Final answer
    x = 100,287.07

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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.