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Finding the Fourth Proportional to 111,525.40, 153,835.04 and 66,171.28

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Solution

The fourth proportional to 111,525.40, 153,835.04 and 66,171.28 is: 91,274.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,525.40 : 153,835.04 = 66,171.28 : x
  2. Step 2: Convert to fraction form
    111,525.40/153,835.04 = 66,171.28/x
  3. Step 3: Cross multiply
    111,525.40x = 153,835.04 × 66,171.28
  4. Step 4: Simplify right side
    111,525.40x = 10,179,461,505.65
  5. Step 5: Solve for x
    x = 10,179,461,505.65/111,525.40
  6. Step 6: Final answer
    x = 91,274.83

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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.