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Finding the Fourth Proportional to 85,728.38, 118,305.77 and 48,002.63

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Solution

The fourth proportional to 85,728.38, 118,305.77 and 48,002.63 is: 66,243.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,728.38 : 118,305.77 = 48,002.63 : x
  2. Step 2: Convert to fraction form
    85,728.38/118,305.77 = 48,002.63/x
  3. Step 3: Cross multiply
    85,728.38x = 118,305.77 × 48,002.63
  4. Step 4: Simplify right side
    85,728.38x = 5,678,987,272.63
  5. Step 5: Solve for x
    x = 5,678,987,272.63/85,728.38
  6. Step 6: Final answer
    x = 66,243.96

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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.