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Finding the Fourth Proportional to 154,071.20, 231,106.80 and 91,863.20

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Solution

The fourth proportional to 154,071.20, 231,106.80 and 91,863.20 is: 137,794.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,071.20 : 231,106.80 = 91,863.20 : x
  2. Step 2: Convert to fraction form
    154,071.20/231,106.80 = 91,863.20/x
  3. Step 3: Cross multiply
    154,071.20x = 231,106.80 × 91,863.20
  4. Step 4: Simplify right side
    154,071.20x = 21,230,210,189.76
  5. Step 5: Solve for x
    x = 21,230,210,189.76/154,071.20
  6. Step 6: Final answer
    x = 137,794.80

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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.