Home / 154,779.89-213,626.88-100,399.46

Finding the Fourth Proportional to 154,779.89, 213,626.88 and 100,399.46

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Solution

The fourth proportional to 154,779.89, 213,626.88 and 100,399.46 is: 138,571.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,779.89 : 213,626.88 = 100,399.46 : x
  2. Step 2: Convert to fraction form
    154,779.89/213,626.88 = 100,399.46/x
  3. Step 3: Cross multiply
    154,779.89x = 213,626.88 × 100,399.46
  4. Step 4: Simplify right side
    154,779.89x = 21,448,022,325.35
  5. Step 5: Solve for x
    x = 21,448,022,325.35/154,779.89
  6. Step 6: Final answer
    x = 138,571.12

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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.