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Finding the Fourth Proportional to 68,004.20, 102,020.70 and 20,615.40

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Solution

The fourth proportional to 68,004.20, 102,020.70 and 20,615.40 is: 30,927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,004.20 : 102,020.70 = 20,615.40 : x
  2. Step 2: Convert to fraction form
    68,004.20/102,020.70 = 20,615.40/x
  3. Step 3: Cross multiply
    68,004.20x = 102,020.70 × 20,615.40
  4. Step 4: Simplify right side
    68,004.20x = 2,103,197,538.78
  5. Step 5: Solve for x
    x = 2,103,197,538.78/68,004.20
  6. Step 6: Final answer
    x = 30,927.47

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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.