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Finding the Fourth Proportional to 68,240.55, 102,342.60 and 20,855.55

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Solution

The fourth proportional to 68,240.55, 102,342.60 and 20,855.55 is: 31,277.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,240.55 : 102,342.60 = 20,855.55 : x
  2. Step 2: Convert to fraction form
    68,240.55/102,342.60 = 20,855.55/x
  3. Step 3: Cross multiply
    68,240.55x = 102,342.60 × 20,855.55
  4. Step 4: Simplify right side
    68,240.55x = 2,134,411,211.43
  5. Step 5: Solve for x
    x = 2,134,411,211.43/68,240.55
  6. Step 6: Final answer
    x = 31,277.76

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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.