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Finding the Fourth Proportional to 154,166.78, 231,066.09 and 79,322.78

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Solution

The fourth proportional to 154,166.78, 231,066.09 and 79,322.78 is: 118,889.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,166.78 : 231,066.09 = 79,322.78 : x
  2. Step 2: Convert to fraction form
    154,166.78/231,066.09 = 79,322.78/x
  3. Step 3: Cross multiply
    154,166.78x = 231,066.09 × 79,322.78
  4. Step 4: Simplify right side
    154,166.78x = 18,328,803,467.20
  5. Step 5: Solve for x
    x = 18,328,803,467.20/154,166.78
  6. Step 6: Final answer
    x = 118,889.45

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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.