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Finding the Fourth Proportional to 99,020.63, 136,644.66 and 53,697.78

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Solution

The fourth proportional to 99,020.63, 136,644.66 and 53,697.78 is: 74,100.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,020.63 : 136,644.66 = 53,697.78 : x
  2. Step 2: Convert to fraction form
    99,020.63/136,644.66 = 53,697.78/x
  3. Step 3: Cross multiply
    99,020.63x = 136,644.66 × 53,697.78
  4. Step 4: Simplify right side
    99,020.63x = 7,337,514,890.85
  5. Step 5: Solve for x
    x = 7,337,514,890.85/99,020.63
  6. Step 6: Final answer
    x = 74,100.87

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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.