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Finding the Fourth Proportional to 111,983.93, 154,537.78 and 61,682.93

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Solution

The fourth proportional to 111,983.93, 154,537.78 and 61,682.93 is: 85,122.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,983.93 : 154,537.78 = 61,682.93 : x
  2. Step 2: Convert to fraction form
    111,983.93/154,537.78 = 61,682.93/x
  3. Step 3: Cross multiply
    111,983.93x = 154,537.78 × 61,682.93
  4. Step 4: Simplify right side
    111,983.93x = 9,532,343,066.10
  5. Step 5: Solve for x
    x = 9,532,343,066.10/111,983.93
  6. Step 6: Final answer
    x = 85,122.42

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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.