Home / 90,128.85-135,215.42-30,965.37

Finding the Fourth Proportional to 90,128.85, 135,215.42 and 30,965.37

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Solution

The fourth proportional to 90,128.85, 135,215.42 and 30,965.37 is: 46,455.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,128.85 : 135,215.42 = 30,965.37 : x
  2. Step 2: Convert to fraction form
    90,128.85/135,215.42 = 30,965.37/x
  3. Step 3: Cross multiply
    90,128.85x = 135,215.42 × 30,965.37
  4. Step 4: Simplify right side
    90,128.85x = 4,186,995,355.18
  5. Step 5: Solve for x
    x = 4,186,995,355.18/90,128.85
  6. Step 6: Final answer
    x = 46,455.66

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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.