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Finding the Fourth Proportional to 66,851.60, 92,230.80 and 39,994.88

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Solution

The fourth proportional to 66,851.60, 92,230.80 and 39,994.88 is: 55,178.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,851.60 : 92,230.80 = 39,994.88 : x
  2. Step 2: Convert to fraction form
    66,851.60/92,230.80 = 39,994.88/x
  3. Step 3: Cross multiply
    66,851.60x = 92,230.80 × 39,994.88
  4. Step 4: Simplify right side
    66,851.60x = 3,688,759,778.30
  5. Step 5: Solve for x
    x = 3,688,759,778.30/66,851.60
  6. Step 6: Final answer
    x = 55,178.33

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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.