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Finding the Fourth Proportional to 56,658.35, 84,910.95 and 21,578.87

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Solution

The fourth proportional to 56,658.35, 84,910.95 and 21,578.87 is: 32,339.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,658.35 : 84,910.95 = 21,578.87 : x
  2. Step 2: Convert to fraction form
    56,658.35/84,910.95 = 21,578.87/x
  3. Step 3: Cross multiply
    56,658.35x = 84,910.95 × 21,578.87
  4. Step 4: Simplify right side
    56,658.35x = 1,832,282,563.90
  5. Step 5: Solve for x
    x = 1,832,282,563.90/56,658.35
  6. Step 6: Final answer
    x = 32,339.14

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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.