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Finding the Fourth Proportional to 111,989.90, 154,540.23 and 69,547.52

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Solution

The fourth proportional to 111,989.90, 154,540.23 and 69,547.52 is: 95,971.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989.90 : 154,540.23 = 69,547.52 : x
  2. Step 2: Convert to fraction form
    111,989.90/154,540.23 = 69,547.52/x
  3. Step 3: Cross multiply
    111,989.90x = 154,540.23 × 69,547.52
  4. Step 4: Simplify right side
    111,989.90x = 10,747,889,736.73
  5. Step 5: Solve for x
    x = 10,747,889,736.73/111,989.90
  6. Step 6: Final answer
    x = 95,971.96

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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.