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Finding the Fourth Proportional to 111,475.75, 153,786.30 and 66,155.64

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Solution

The fourth proportional to 111,475.75, 153,786.30 and 66,155.64 is: 91,264.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,475.75 : 153,786.30 = 66,155.64 : x
  2. Step 2: Convert to fraction form
    111,475.75/153,786.30 = 66,155.64/x
  3. Step 3: Cross multiply
    111,475.75x = 153,786.30 × 66,155.64
  4. Step 4: Simplify right side
    111,475.75x = 10,173,830,715.27
  5. Step 5: Solve for x
    x = 10,173,830,715.27/111,475.75
  6. Step 6: Final answer
    x = 91,264.97

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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.