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Finding the Fourth Proportional to 66,708.87, 92,058.12 and 39,867.09

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Solution

The fourth proportional to 66,708.87, 92,058.12 and 39,867.09 is: 55,016.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,708.87 : 92,058.12 = 39,867.09 : x
  2. Step 2: Convert to fraction form
    66,708.87/92,058.12 = 39,867.09/x
  3. Step 3: Cross multiply
    66,708.87x = 92,058.12 × 39,867.09
  4. Step 4: Simplify right side
    66,708.87x = 3,670,089,355.27
  5. Step 5: Solve for x
    x = 3,670,089,355.27/66,708.87
  6. Step 6: Final answer
    x = 55,016.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.