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Finding the Fourth Proportional to 111,317.40, 166,976.10 and 28,211.40

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Solution

The fourth proportional to 111,317.40, 166,976.10 and 28,211.40 is: 42,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,317.40 : 166,976.10 = 28,211.40 : x
  2. Step 2: Convert to fraction form
    111,317.40/166,976.10 = 28,211.40/x
  3. Step 3: Cross multiply
    111,317.40x = 166,976.10 × 28,211.40
  4. Step 4: Simplify right side
    111,317.40x = 4,710,629,547.54
  5. Step 5: Solve for x
    x = 4,710,629,547.54/111,317.40
  6. Step 6: Final answer
    x = 42,317.10

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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.