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Finding the Fourth Proportional to 111,979.40, 154,525.74 and 69,537.02

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Solution

The fourth proportional to 111,979.40, 154,525.74 and 69,537.02 is: 95,957.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,979.40 : 154,525.74 = 69,537.02 : x
  2. Step 2: Convert to fraction form
    111,979.40/154,525.74 = 69,537.02/x
  3. Step 3: Cross multiply
    111,979.40x = 154,525.74 × 69,537.02
  4. Step 4: Simplify right side
    111,979.40x = 10,745,259,472.89
  5. Step 5: Solve for x
    x = 10,745,259,472.89/111,979.40
  6. Step 6: Final answer
    x = 95,957.47

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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.