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Finding the Fourth Proportional to 89,244.45, 133,866.81 and 66,778.56

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Solution

The fourth proportional to 89,244.45, 133,866.81 and 66,778.56 is: 100,167.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,244.45 : 133,866.81 = 66,778.56 : x
  2. Step 2: Convert to fraction form
    89,244.45/133,866.81 = 66,778.56/x
  3. Step 3: Cross multiply
    89,244.45x = 133,866.81 × 66,778.56
  4. Step 4: Simplify right side
    89,244.45x = 8,939,432,803.59
  5. Step 5: Solve for x
    x = 8,939,432,803.59/89,244.45
  6. Step 6: Final answer
    x = 100,167.94

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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.