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Finding the Fourth Proportional to 67,674.72, 101,485.08 and 20,915.04

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Solution

The fourth proportional to 67,674.72, 101,485.08 and 20,915.04 is: 31,364.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,674.72 : 101,485.08 = 20,915.04 : x
  2. Step 2: Convert to fraction form
    67,674.72/101,485.08 = 20,915.04/x
  3. Step 3: Cross multiply
    67,674.72x = 101,485.08 × 20,915.04
  4. Step 4: Simplify right side
    67,674.72x = 2,122,564,507.60
  5. Step 5: Solve for x
    x = 2,122,564,507.60/67,674.72
  6. Step 6: Final answer
    x = 31,364.22

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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.