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Finding the Fourth Proportional to 111,355.16, 153,464.02 and 79,091.16

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Solution

The fourth proportional to 111,355.16, 153,464.02 and 79,091.16 is: 108,999.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,355.16 : 153,464.02 = 79,091.16 : x
  2. Step 2: Convert to fraction form
    111,355.16/153,464.02 = 79,091.16/x
  3. Step 3: Cross multiply
    111,355.16x = 153,464.02 × 79,091.16
  4. Step 4: Simplify right side
    111,355.16x = 12,137,647,360.06
  5. Step 5: Solve for x
    x = 12,137,647,360.06/111,355.16
  6. Step 6: Final answer
    x = 108,999.42

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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.