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Finding the Fourth Proportional to 111,840, 154,339.20 and 61,540.80

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Solution

The fourth proportional to 111,840, 154,339.20 and 61,540.80 is: 84,926.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,840 : 154,339.20 = 61,540.80 : x
  2. Step 2: Convert to fraction form
    111,840/154,339.20 = 61,540.80/x
  3. Step 3: Cross multiply
    111,840x = 154,339.20 × 61,540.80
  4. Step 4: Simplify right side
    111,840x = 9,498,157,839.36
  5. Step 5: Solve for x
    x = 9,498,157,839.36/111,840
  6. Step 6: Final answer
    x = 84,926.30

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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.