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Finding the Fourth Proportional to 71,840.48, 99,135.96 and 39,568.81

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Solution

The fourth proportional to 71,840.48, 99,135.96 and 39,568.81 is: 54,602.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,840.48 : 99,135.96 = 39,568.81 : x
  2. Step 2: Convert to fraction form
    71,840.48/99,135.96 = 39,568.81/x
  3. Step 3: Cross multiply
    71,840.48x = 99,135.96 × 39,568.81
  4. Step 4: Simplify right side
    71,840.48x = 3,922,692,114.33
  5. Step 5: Solve for x
    x = 3,922,692,114.33/71,840.48
  6. Step 6: Final answer
    x = 54,602.81

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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.