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Finding the Fourth Proportional to 67,123.46, 100,678.70 and 20,376.74

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Solution

The fourth proportional to 67,123.46, 100,678.70 and 20,376.74 is: 30,563.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,123.46 : 100,678.70 = 20,376.74 : x
  2. Step 2: Convert to fraction form
    67,123.46/100,678.70 = 20,376.74/x
  3. Step 3: Cross multiply
    67,123.46x = 100,678.70 × 20,376.74
  4. Step 4: Simplify right side
    67,123.46x = 2,051,503,693.44
  5. Step 5: Solve for x
    x = 2,051,503,693.44/67,123.46
  6. Step 6: Final answer
    x = 30,563.14

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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.