Home / 100,040.64-138,055.32-54,718.44

Finding the Fourth Proportional to 100,040.64, 138,055.32 and 54,718.44

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Solution

The fourth proportional to 100,040.64, 138,055.32 and 54,718.44 is: 75,511.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,040.64 : 138,055.32 = 54,718.44 : x
  2. Step 2: Convert to fraction form
    100,040.64/138,055.32 = 54,718.44/x
  3. Step 3: Cross multiply
    100,040.64x = 138,055.32 × 54,718.44
  4. Step 4: Simplify right side
    100,040.64x = 7,554,171,744.10
  5. Step 5: Solve for x
    x = 7,554,171,744.10/100,040.64
  6. Step 6: Final answer
    x = 75,511.03

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1.5x scale

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.