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Finding the Fourth Proportional to 111,207.10, 166,822.80 and 107,707.90

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Solution

The fourth proportional to 111,207.10, 166,822.80 and 107,707.90 is: 161,573.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,207.10 : 166,822.80 = 107,707.90 : x
  2. Step 2: Convert to fraction form
    111,207.10/166,822.80 = 107,707.90/x
  3. Step 3: Cross multiply
    111,207.10x = 166,822.80 × 107,707.90
  4. Step 4: Simplify right side
    111,207.10x = 17,968,133,460.12
  5. Step 5: Solve for x
    x = 17,968,133,460.12/111,207.10
  6. Step 6: Final answer
    x = 161,573.62

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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.