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Finding the Fourth Proportional to 56,603.91, 84,942.72 and 21,543.87

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Solution

The fourth proportional to 56,603.91, 84,942.72 and 21,543.87 is: 32,329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,603.91 : 84,942.72 = 21,543.87 : x
  2. Step 2: Convert to fraction form
    56,603.91/84,942.72 = 21,543.87/x
  3. Step 3: Cross multiply
    56,603.91x = 84,942.72 × 21,543.87
  4. Step 4: Simplify right side
    56,603.91x = 1,829,994,917.13
  5. Step 5: Solve for x
    x = 1,829,994,917.13/56,603.91
  6. Step 6: Final answer
    x = 32,329.83

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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.