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Finding the Fourth Proportional to 68,941.76, 103,208.52 and 42,561.68

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Solution

The fourth proportional to 68,941.76, 103,208.52 and 42,561.68 is: 63,716.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,941.76 : 103,208.52 = 42,561.68 : x
  2. Step 2: Convert to fraction form
    68,941.76/103,208.52 = 42,561.68/x
  3. Step 3: Cross multiply
    68,941.76x = 103,208.52 × 42,561.68
  4. Step 4: Simplify right side
    68,941.76x = 4,392,728,001.51
  5. Step 5: Solve for x
    x = 4,392,728,001.51/68,941.76
  6. Step 6: Final answer
    x = 63,716.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.