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Finding the Fourth Proportional to 99,181.40, 148,917.90 and 69,729.80

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Solution

The fourth proportional to 99,181.40, 148,917.90 and 69,729.80 is: 104,697.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,181.40 : 148,917.90 = 69,729.80 : x
  2. Step 2: Convert to fraction form
    99,181.40/148,917.90 = 69,729.80/x
  3. Step 3: Cross multiply
    99,181.40x = 148,917.90 × 69,729.80
  4. Step 4: Simplify right side
    99,181.40x = 10,384,015,383.42
  5. Step 5: Solve for x
    x = 10,384,015,383.42/99,181.40
  6. Step 6: Final answer
    x = 104,697.21

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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.