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Finding the Fourth Proportional to 111,989.08, 168,008.54 and 40,911.58

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Solution

The fourth proportional to 111,989.08, 168,008.54 and 40,911.58 is: 61,376.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989.08 : 168,008.54 = 40,911.58 : x
  2. Step 2: Convert to fraction form
    111,989.08/168,008.54 = 40,911.58/x
  3. Step 3: Cross multiply
    111,989.08x = 168,008.54 × 40,911.58
  4. Step 4: Simplify right side
    111,989.08x = 6,873,494,824.89
  5. Step 5: Solve for x
    x = 6,873,494,824.89/111,989.08
  6. Step 6: Final answer
    x = 61,376.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.