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Finding the Fourth Proportional to 56,866.91, 85,311.31 and 21,803.84

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Solution

The fourth proportional to 56,866.91, 85,311.31 and 21,803.84 is: 32,709.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,866.91 : 85,311.31 = 21,803.84 : x
  2. Step 2: Convert to fraction form
    56,866.91/85,311.31 = 21,803.84/x
  3. Step 3: Cross multiply
    56,866.91x = 85,311.31 × 21,803.84
  4. Step 4: Simplify right side
    56,866.91x = 1,860,113,731.90
  5. Step 5: Solve for x
    x = 1,860,113,731.90/56,866.91
  6. Step 6: Final answer
    x = 32,709.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.