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Finding the Fourth Proportional to 68,485.50, 102,728.28 and 21,738.38

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Solution

The fourth proportional to 68,485.50, 102,728.28 and 21,738.38 is: 32,607.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,485.50 : 102,728.28 = 21,738.38 : x
  2. Step 2: Convert to fraction form
    68,485.50/102,728.28 = 21,738.38/x
  3. Step 3: Cross multiply
    68,485.50x = 102,728.28 × 21,738.38
  4. Step 4: Simplify right side
    68,485.50x = 2,233,145,955.26
  5. Step 5: Solve for x
    x = 2,233,145,955.26/68,485.50
  6. Step 6: Final answer
    x = 32,607.57

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1.5x scale

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.