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Finding the Fourth Proportional to 111,172.66, 153,419.25 and 65,853.22

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Solution

The fourth proportional to 111,172.66, 153,419.25 and 65,853.22 is: 90,878.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,172.66 : 153,419.25 = 65,853.22 : x
  2. Step 2: Convert to fraction form
    111,172.66/153,419.25 = 65,853.22/x
  3. Step 3: Cross multiply
    111,172.66x = 153,419.25 × 65,853.22
  4. Step 4: Simplify right side
    111,172.66x = 10,103,151,622.49
  5. Step 5: Solve for x
    x = 10,103,151,622.49/111,172.66
  6. Step 6: Final answer
    x = 90,878.02

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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.