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Finding the Fourth Proportional to 111,972.68, 154,515.21 and 61,671.68

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Solution

The fourth proportional to 111,972.68, 154,515.21 and 61,671.68 is: 85,103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,972.68 : 154,515.21 = 61,671.68 : x
  2. Step 2: Convert to fraction form
    111,972.68/154,515.21 = 61,671.68/x
  3. Step 3: Cross multiply
    111,972.68x = 154,515.21 × 61,671.68
  4. Step 4: Simplify right side
    111,972.68x = 9,529,212,586.25
  5. Step 5: Solve for x
    x = 9,529,212,586.25/111,972.68
  6. Step 6: Final answer
    x = 85,103.01

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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.