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Finding the Fourth Proportional to 67,272, 92,835.36 and 38,994.09

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Solution

The fourth proportional to 67,272, 92,835.36 and 38,994.09 is: 53,811.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,272 : 92,835.36 = 38,994.09 : x
  2. Step 2: Convert to fraction form
    67,272/92,835.36 = 38,994.09/x
  3. Step 3: Cross multiply
    67,272x = 92,835.36 × 38,994.09
  4. Step 4: Simplify right side
    67,272x = 3,620,030,383.02
  5. Step 5: Solve for x
    x = 3,620,030,383.02/67,272
  6. Step 6: Final answer
    x = 53,811.84

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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.