Home / 90,468.23-135,914.39-85,355.83

Finding the Fourth Proportional to 90,468.23, 135,914.39 and 85,355.83

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Solution

The fourth proportional to 90,468.23, 135,914.39 and 85,355.83 is: 128,233.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,468.23 : 135,914.39 = 85,355.83 : x
  2. Step 2: Convert to fraction form
    90,468.23/135,914.39 = 85,355.83/x
  3. Step 3: Cross multiply
    90,468.23x = 135,914.39 × 85,355.83
  4. Step 4: Simplify right side
    90,468.23x = 11,601,085,630.59
  5. Step 5: Solve for x
    x = 11,601,085,630.59/90,468.23
  6. Step 6: Final answer
    x = 128,233.81

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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.