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Finding the Fourth Proportional to 77,553.63, 107,020.35 and 45,289.89

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Solution

The fourth proportional to 77,553.63, 107,020.35 and 45,289.89 is: 62,497.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,553.63 : 107,020.35 = 45,289.89 : x
  2. Step 2: Convert to fraction form
    77,553.63/107,020.35 = 45,289.89/x
  3. Step 3: Cross multiply
    77,553.63x = 107,020.35 × 45,289.89
  4. Step 4: Simplify right side
    77,553.63x = 4,846,939,879.26
  5. Step 5: Solve for x
    x = 4,846,939,879.26/77,553.63
  6. Step 6: Final answer
    x = 62,497.91

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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.