Home / 111,789.17-154,214.85-66,435.05

Finding the Fourth Proportional to 111,789.17, 154,214.85 and 66,435.05

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Solution

The fourth proportional to 111,789.17, 154,214.85 and 66,435.05 is: 91,648.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,789.17 : 154,214.85 = 66,435.05 : x
  2. Step 2: Convert to fraction form
    111,789.17/154,214.85 = 66,435.05/x
  3. Step 3: Cross multiply
    111,789.17x = 154,214.85 × 66,435.05
  4. Step 4: Simplify right side
    111,789.17x = 10,245,271,270.49
  5. Step 5: Solve for x
    x = 10,245,271,270.49/111,789.17
  6. Step 6: Final answer
    x = 91,648.16

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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.