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Finding the Fourth Proportional to 91,099.84, 125,718 and 50,816.20

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Solution

The fourth proportional to 91,099.84, 125,718 and 50,816.20 is: 70,126.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,099.84 : 125,718 = 50,816.20 : x
  2. Step 2: Convert to fraction form
    91,099.84/125,718 = 50,816.20/x
  3. Step 3: Cross multiply
    91,099.84x = 125,718 × 50,816.20
  4. Step 4: Simplify right side
    91,099.84x = 6,388,511,031.60
  5. Step 5: Solve for x
    x = 6,388,511,031.60/91,099.84
  6. Step 6: Final answer
    x = 70,126.48

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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.