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Finding the Fourth Proportional to 85,243.86, 117,637.20 and 47,520.54

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Solution

The fourth proportional to 85,243.86, 117,637.20 and 47,520.54 is: 65,578.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,243.86 : 117,637.20 = 47,520.54 : x
  2. Step 2: Convert to fraction form
    85,243.86/117,637.20 = 47,520.54/x
  3. Step 3: Cross multiply
    85,243.86x = 117,637.20 × 47,520.54
  4. Step 4: Simplify right side
    85,243.86x = 5,590,183,268.09
  5. Step 5: Solve for x
    x = 5,590,183,268.09/85,243.86
  6. Step 6: Final answer
    x = 65,578.72

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1.5x scale

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.