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Finding the Fourth Proportional to 68,731.20, 94,855.72 and 38,521.64

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Solution

The fourth proportional to 68,731.20, 94,855.72 and 38,521.64 is: 53,163.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,731.20 : 94,855.72 = 38,521.64 : x
  2. Step 2: Convert to fraction form
    68,731.20/94,855.72 = 38,521.64/x
  3. Step 3: Cross multiply
    68,731.20x = 94,855.72 × 38,521.64
  4. Step 4: Simplify right side
    68,731.20x = 3,653,997,897.78
  5. Step 5: Solve for x
    x = 3,653,997,897.78/68,731.20
  6. Step 6: Final answer
    x = 53,163.60

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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.