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Finding the Fourth Proportional to 73,590.72, 110,404.71 and 21,000.39

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Solution

The fourth proportional to 73,590.72, 110,404.71 and 21,000.39 is: 31,505.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,590.72 : 110,404.71 = 21,000.39 : x
  2. Step 2: Convert to fraction form
    73,590.72/110,404.71 = 21,000.39/x
  3. Step 3: Cross multiply
    73,590.72x = 110,404.71 × 21,000.39
  4. Step 4: Simplify right side
    73,590.72x = 2,318,541,967.84
  5. Step 5: Solve for x
    x = 2,318,541,967.84/73,590.72
  6. Step 6: Final answer
    x = 31,505.90

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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.