Home / 90,144.07-135,223.40-30,979.78

Finding the Fourth Proportional to 90,144.07, 135,223.40 and 30,979.78

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Solution

The fourth proportional to 90,144.07, 135,223.40 and 30,979.78 is: 46,472.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,144.07 : 135,223.40 = 30,979.78 : x
  2. Step 2: Convert to fraction form
    90,144.07/135,223.40 = 30,979.78/x
  3. Step 3: Cross multiply
    90,144.07x = 135,223.40 × 30,979.78
  4. Step 4: Simplify right side
    90,144.07x = 4,189,191,027.95
  5. Step 5: Solve for x
    x = 4,189,191,027.95/90,144.07
  6. Step 6: Final answer
    x = 46,472.18

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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.