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Finding the Fourth Proportional to 69,720.77, 96,228.72 and 41,420.99

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Solution

The fourth proportional to 69,720.77, 96,228.72 and 41,420.99 is: 57,169.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,720.77 : 96,228.72 = 41,420.99 : x
  2. Step 2: Convert to fraction form
    69,720.77/96,228.72 = 41,420.99/x
  3. Step 3: Cross multiply
    69,720.77x = 96,228.72 × 41,420.99
  4. Step 4: Simplify right side
    69,720.77x = 3,985,888,367.69
  5. Step 5: Solve for x
    x = 3,985,888,367.69/69,720.77
  6. Step 6: Final answer
    x = 57,169.31

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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.