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Finding the Fourth Proportional to 154,620.70, 231,894.70 and 87,181.72

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Solution

The fourth proportional to 154,620.70, 231,894.70 and 87,181.72 is: 130,752.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,620.70 : 231,894.70 = 87,181.72 : x
  2. Step 2: Convert to fraction form
    154,620.70/231,894.70 = 87,181.72/x
  3. Step 3: Cross multiply
    154,620.70x = 231,894.70 × 87,181.72
  4. Step 4: Simplify right side
    154,620.70x = 20,216,978,007.19
  5. Step 5: Solve for x
    x = 20,216,978,007.19/154,620.70
  6. Step 6: Final answer
    x = 130,752.08

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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.