Home / 90,106.54-135,215.40-45,765.12

Finding the Fourth Proportional to 90,106.54, 135,215.40 and 45,765.12

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Solution

The fourth proportional to 90,106.54, 135,215.40 and 45,765.12 is: 68,675.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,106.54 : 135,215.40 = 45,765.12 : x
  2. Step 2: Convert to fraction form
    90,106.54/135,215.40 = 45,765.12/x
  3. Step 3: Cross multiply
    90,106.54x = 135,215.40 × 45,765.12
  4. Step 4: Simplify right side
    90,106.54x = 6,188,149,006.85
  5. Step 5: Solve for x
    x = 6,188,149,006.85/90,106.54
  6. Step 6: Final answer
    x = 68,675.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.