Home / 90,626.10-135,939.15-38,138.10

Finding the Fourth Proportional to 90,626.10, 135,939.15 and 38,138.10

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Solution

The fourth proportional to 90,626.10, 135,939.15 and 38,138.10 is: 57,207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,626.10 : 135,939.15 = 38,138.10 : x
  2. Step 2: Convert to fraction form
    90,626.10/135,939.15 = 38,138.10/x
  3. Step 3: Cross multiply
    90,626.10x = 135,939.15 × 38,138.10
  4. Step 4: Simplify right side
    90,626.10x = 5,184,460,896.62
  5. Step 5: Solve for x
    x = 5,184,460,896.62/90,626.10
  6. Step 6: Final answer
    x = 57,207.15

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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.