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Finding the Fourth Proportional to 109,239.84, 150,718.32 and 66,754.80

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Solution

The fourth proportional to 109,239.84, 150,718.32 and 66,754.80 is: 92,101.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,239.84 : 150,718.32 = 66,754.80 : x
  2. Step 2: Convert to fraction form
    109,239.84/150,718.32 = 66,754.80/x
  3. Step 3: Cross multiply
    109,239.84x = 150,718.32 × 66,754.80
  4. Step 4: Simplify right side
    109,239.84x = 10,061,171,307.94
  5. Step 5: Solve for x
    x = 10,061,171,307.94/109,239.84
  6. Step 6: Final answer
    x = 92,101.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.