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Finding the Fourth Proportional to 111,345.50, 166,992.65 and 66,379.56

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Solution

The fourth proportional to 111,345.50, 166,992.65 and 66,379.56 is: 99,554.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,345.50 : 166,992.65 = 66,379.56 : x
  2. Step 2: Convert to fraction form
    111,345.50/166,992.65 = 66,379.56/x
  3. Step 3: Cross multiply
    111,345.50x = 166,992.65 × 66,379.56
  4. Step 4: Simplify right side
    111,345.50x = 11,084,898,298.34
  5. Step 5: Solve for x
    x = 11,084,898,298.34/111,345.50
  6. Step 6: Final answer
    x = 99,554.08

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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.