Home / 90,128.07-135,247.38-45,786.63

Finding the Fourth Proportional to 90,128.07, 135,247.38 and 45,786.63

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Solution

The fourth proportional to 90,128.07, 135,247.38 and 45,786.63 is: 68,708.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,128.07 : 135,247.38 = 45,786.63 : x
  2. Step 2: Convert to fraction form
    90,128.07/135,247.38 = 45,786.63/x
  3. Step 3: Cross multiply
    90,128.07x = 135,247.38 × 45,786.63
  4. Step 4: Simplify right side
    90,128.07x = 6,192,521,746.53
  5. Step 5: Solve for x
    x = 6,192,521,746.53/90,128.07
  6. Step 6: Final answer
    x = 68,708.03

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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.