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Finding the Fourth Proportional to 68,724.52, 94,838.64 and 38,509.72

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Solution

The fourth proportional to 68,724.52, 94,838.64 and 38,509.72 is: 53,142.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,724.52 : 94,838.64 = 38,509.72 : x
  2. Step 2: Convert to fraction form
    68,724.52/94,838.64 = 38,509.72/x
  3. Step 3: Cross multiply
    68,724.52x = 94,838.64 × 38,509.72
  4. Step 4: Simplify right side
    68,724.52x = 3,652,209,471.58
  5. Step 5: Solve for x
    x = 3,652,209,471.58/68,724.52
  6. Step 6: Final answer
    x = 53,142.74

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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.