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Finding the Fourth Proportional to 67,285.70, 100,927.74 and 20,538.72

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Solution

The fourth proportional to 67,285.70, 100,927.74 and 20,538.72 is: 30,807.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,285.70 : 100,927.74 = 20,538.72 : x
  2. Step 2: Convert to fraction form
    67,285.70/100,927.74 = 20,538.72/x
  3. Step 3: Cross multiply
    67,285.70x = 100,927.74 × 20,538.72
  4. Step 4: Simplify right side
    67,285.70x = 2,072,926,592.09
  5. Step 5: Solve for x
    x = 2,072,926,592.09/67,285.70
  6. Step 6: Final answer
    x = 30,807.83

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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.