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Finding the Fourth Proportional to 68,611.20, 94,682.40 and 38,396

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Solution

The fourth proportional to 68,611.20, 94,682.40 and 38,396 is: 52,985.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,611.20 : 94,682.40 = 38,396 : x
  2. Step 2: Convert to fraction form
    68,611.20/94,682.40 = 38,396/x
  3. Step 3: Cross multiply
    68,611.20x = 94,682.40 × 38,396
  4. Step 4: Simplify right side
    68,611.20x = 3,635,425,430.40
  5. Step 5: Solve for x
    x = 3,635,425,430.40/68,611.20
  6. Step 6: Final answer
    x = 52,985.89

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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.