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Finding the Fourth Proportional to 111,756.26, 154,160.51 and 66,448.86

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Solution

The fourth proportional to 111,756.26, 154,160.51 and 66,448.86 is: 91,661.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,756.26 : 154,160.51 = 66,448.86 : x
  2. Step 2: Convert to fraction form
    111,756.26/154,160.51 = 66,448.86/x
  3. Step 3: Cross multiply
    111,756.26x = 154,160.51 × 66,448.86
  4. Step 4: Simplify right side
    111,756.26x = 10,243,789,423.06
  5. Step 5: Solve for x
    x = 10,243,789,423.06/111,756.26
  6. Step 6: Final answer
    x = 91,661.89

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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.