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Finding the Fourth Proportional to 55,285.70, 82,879.43 and 21,543.89

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Solution

The fourth proportional to 55,285.70, 82,879.43 and 21,543.89 is: 32,296.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,285.70 : 82,879.43 = 21,543.89 : x
  2. Step 2: Convert to fraction form
    55,285.70/82,879.43 = 21,543.89/x
  3. Step 3: Cross multiply
    55,285.70x = 82,879.43 × 21,543.89
  4. Step 4: Simplify right side
    55,285.70x = 1,785,544,801.07
  5. Step 5: Solve for x
    x = 1,785,544,801.07/55,285.70
  6. Step 6: Final answer
    x = 32,296.69

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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.