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Finding the Fourth Proportional to 68,472.64, 94,483.56 and 40,168

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Solution

The fourth proportional to 68,472.64, 94,483.56 and 40,168 is: 55,426.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,472.64 : 94,483.56 = 40,168 : x
  2. Step 2: Convert to fraction form
    68,472.64/94,483.56 = 40,168/x
  3. Step 3: Cross multiply
    68,472.64x = 94,483.56 × 40,168
  4. Step 4: Simplify right side
    68,472.64x = 3,795,215,638.08
  5. Step 5: Solve for x
    x = 3,795,215,638.08/68,472.64
  6. Step 6: Final answer
    x = 55,426.75

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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.