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Finding the Fourth Proportional to 111,915.84, 154,443.36 and 61,614.80

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Solution

The fourth proportional to 111,915.84, 154,443.36 and 61,614.80 is: 85,028.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,915.84 : 154,443.36 = 61,614.80 : x
  2. Step 2: Convert to fraction form
    111,915.84/154,443.36 = 61,614.80/x
  3. Step 3: Cross multiply
    111,915.84x = 154,443.36 × 61,614.80
  4. Step 4: Simplify right side
    111,915.84x = 9,515,996,737.73
  5. Step 5: Solve for x
    x = 9,515,996,737.73/111,915.84
  6. Step 6: Final answer
    x = 85,028.15

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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.