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Finding the Fourth Proportional to 111,663.72, 154,094.78 and 61,361.64

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Solution

The fourth proportional to 111,663.72, 154,094.78 and 61,361.64 is: 84,678.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,663.72 : 154,094.78 = 61,361.64 : x
  2. Step 2: Convert to fraction form
    111,663.72/154,094.78 = 61,361.64/x
  3. Step 3: Cross multiply
    111,663.72x = 154,094.78 × 61,361.64
  4. Step 4: Simplify right side
    111,663.72x = 9,455,508,416.24
  5. Step 5: Solve for x
    x = 9,455,508,416.24/111,663.72
  6. Step 6: Final answer
    x = 84,678.43

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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.