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Finding the Fourth Proportional to 85,735.99, 128,686.83 and 41,393.98

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Solution

The fourth proportional to 85,735.99, 128,686.83 and 41,393.98 is: 62,130.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,735.99 : 128,686.83 = 41,393.98 : x
  2. Step 2: Convert to fraction form
    85,735.99/128,686.83 = 41,393.98/x
  3. Step 3: Cross multiply
    85,735.99x = 128,686.83 × 41,393.98
  4. Step 4: Simplify right side
    85,735.99x = 5,326,860,067.28
  5. Step 5: Solve for x
    x = 5,326,860,067.28/85,735.99
  6. Step 6: Final answer
    x = 62,130.97

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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.