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Finding the Fourth Proportional to 68,215.20, 102,337.20 and 20,826.40

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Solution

The fourth proportional to 68,215.20, 102,337.20 and 20,826.40 is: 31,244.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,215.20 : 102,337.20 = 20,826.40 : x
  2. Step 2: Convert to fraction form
    68,215.20/102,337.20 = 20,826.40/x
  3. Step 3: Cross multiply
    68,215.20x = 102,337.20 × 20,826.40
  4. Step 4: Simplify right side
    68,215.20x = 2,131,315,462.08
  5. Step 5: Solve for x
    x = 2,131,315,462.08/68,215.20
  6. Step 6: Final answer
    x = 31,244.00

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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.