Home / 100,541.75-138,710.72-66,105

Finding the Fourth Proportional to 100,541.75, 138,710.72 and 66,105

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Solution

The fourth proportional to 100,541.75, 138,710.72 and 66,105 is: 91,200.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,541.75 : 138,710.72 = 66,105 : x
  2. Step 2: Convert to fraction form
    100,541.75/138,710.72 = 66,105/x
  3. Step 3: Cross multiply
    100,541.75x = 138,710.72 × 66,105
  4. Step 4: Simplify right side
    100,541.75x = 9,169,471,815.08
  5. Step 5: Solve for x
    x = 9,169,471,815.08/100,541.75
  6. Step 6: Final answer
    x = 91,200.64

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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.