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Finding the Fourth Proportional to 85,530.52, 118,021.62 and 49,728.52

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Solution

The fourth proportional to 85,530.52, 118,021.62 and 49,728.52 is: 68,619.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,530.52 : 118,021.62 = 49,728.52 : x
  2. Step 2: Convert to fraction form
    85,530.52/118,021.62 = 49,728.52/x
  3. Step 3: Cross multiply
    85,530.52x = 118,021.62 × 49,728.52
  4. Step 4: Simplify right side
    85,530.52x = 5,869,040,490.60
  5. Step 5: Solve for x
    x = 5,869,040,490.60/85,530.52
  6. Step 6: Final answer
    x = 68,619.25

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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.