Home / 100,346.14-138,479.23-55,028.26

Finding the Fourth Proportional to 100,346.14, 138,479.23 and 55,028.26

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Solution

The fourth proportional to 100,346.14, 138,479.23 and 55,028.26 is: 75,939.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,346.14 : 138,479.23 = 55,028.26 : x
  2. Step 2: Convert to fraction form
    100,346.14/138,479.23 = 55,028.26/x
  3. Step 3: Cross multiply
    100,346.14x = 138,479.23 × 55,028.26
  4. Step 4: Simplify right side
    100,346.14x = 7,620,271,073.04
  5. Step 5: Solve for x
    x = 7,620,271,073.04/100,346.14
  6. Step 6: Final answer
    x = 75,939.85

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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.