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Finding the Fourth Proportional to 154,231.20, 231,130.80 and 122,695.20

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Solution

The fourth proportional to 154,231.20, 231,130.80 and 122,695.20 is: 183,870.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,231.20 : 231,130.80 = 122,695.20 : x
  2. Step 2: Convert to fraction form
    154,231.20/231,130.80 = 122,695.20/x
  3. Step 3: Cross multiply
    154,231.20x = 231,130.80 × 122,695.20
  4. Step 4: Simplify right side
    154,231.20x = 28,358,639,732.16
  5. Step 5: Solve for x
    x = 28,358,639,732.16/154,231.20
  6. Step 6: Final answer
    x = 183,870.97

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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.