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Finding the Fourth Proportional to 99,687.77, 137,590.47 and 57,269.69

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Solution

The fourth proportional to 99,687.77, 137,590.47 and 57,269.69 is: 79,044.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,687.77 : 137,590.47 = 57,269.69 : x
  2. Step 2: Convert to fraction form
    99,687.77/137,590.47 = 57,269.69/x
  3. Step 3: Cross multiply
    99,687.77x = 137,590.47 × 57,269.69
  4. Step 4: Simplify right side
    99,687.77x = 7,879,763,563.85
  5. Step 5: Solve for x
    x = 7,879,763,563.85/99,687.77
  6. Step 6: Final answer
    x = 79,044.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.