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Finding the Fourth Proportional to 111,709.64, 154,136.04 and 66,403.64

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Solution

The fourth proportional to 111,709.64, 154,136.04 and 66,403.64 is: 91,623.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,709.64 : 154,136.04 = 66,403.64 : x
  2. Step 2: Convert to fraction form
    111,709.64/154,136.04 = 66,403.64/x
  3. Step 3: Cross multiply
    111,709.64x = 154,136.04 × 66,403.64
  4. Step 4: Simplify right side
    111,709.64x = 10,235,194,111.19
  5. Step 5: Solve for x
    x = 10,235,194,111.19/111,709.64
  6. Step 6: Final answer
    x = 91,623.19

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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.