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Finding the Fourth Proportional to 77,486.88, 106,939.22 and 45,218.89

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Solution

The fourth proportional to 77,486.88, 106,939.22 and 45,218.89 is: 62,406.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,486.88 : 106,939.22 = 45,218.89 : x
  2. Step 2: Convert to fraction form
    77,486.88/106,939.22 = 45,218.89/x
  3. Step 3: Cross multiply
    77,486.88x = 106,939.22 × 45,218.89
  4. Step 4: Simplify right side
    77,486.88x = 4,835,672,825.87
  5. Step 5: Solve for x
    x = 4,835,672,825.87/77,486.88
  6. Step 6: Final answer
    x = 62,406.34

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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.