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Finding the Fourth Proportional to 68,643.86, 94,724.07 and 38,428.93

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Solution

The fourth proportional to 68,643.86, 94,724.07 and 38,428.93 is: 53,029.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,643.86 : 94,724.07 = 38,428.93 : x
  2. Step 2: Convert to fraction form
    68,643.86/94,724.07 = 38,428.93/x
  3. Step 3: Cross multiply
    68,643.86x = 94,724.07 × 38,428.93
  4. Step 4: Simplify right side
    68,643.86x = 3,640,144,629.64
  5. Step 5: Solve for x
    x = 3,640,144,629.64/68,643.86
  6. Step 6: Final answer
    x = 53,029.43

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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.