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Finding the Fourth Proportional to 111,732.89, 154,191.40 and 61,431.89

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Solution

The fourth proportional to 111,732.89, 154,191.40 and 61,431.89 is: 84,776.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,732.89 : 154,191.40 = 61,431.89 : x
  2. Step 2: Convert to fraction form
    111,732.89/154,191.40 = 61,431.89/x
  3. Step 3: Cross multiply
    111,732.89x = 154,191.40 × 61,431.89
  4. Step 4: Simplify right side
    111,732.89x = 9,472,268,199.21
  5. Step 5: Solve for x
    x = 9,472,268,199.21/111,732.89
  6. Step 6: Final answer
    x = 84,776.01

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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.