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Finding the Fourth Proportional to 66,808, 92,192.34 and 39,965.34

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Solution

The fourth proportional to 66,808, 92,192.34 and 39,965.34 is: 55,150.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,808 : 92,192.34 = 39,965.34 : x
  2. Step 2: Convert to fraction form
    66,808/92,192.34 = 39,965.34/x
  3. Step 3: Cross multiply
    66,808x = 92,192.34 × 39,965.34
  4. Step 4: Simplify right side
    66,808x = 3,684,498,213.50
  5. Step 5: Solve for x
    x = 3,684,498,213.50/66,808
  6. Step 6: Final answer
    x = 55,150.55

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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.