Home / 90,133.09-124,381.38-49,845.78

Finding the Fourth Proportional to 90,133.09, 124,381.38 and 49,845.78

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Solution

The fourth proportional to 90,133.09, 124,381.38 and 49,845.78 is: 68,785.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,133.09 : 124,381.38 = 49,845.78 : x
  2. Step 2: Convert to fraction form
    90,133.09/124,381.38 = 49,845.78/x
  3. Step 3: Cross multiply
    90,133.09x = 124,381.38 × 49,845.78
  4. Step 4: Simplify right side
    90,133.09x = 6,199,886,903.58
  5. Step 5: Solve for x
    x = 6,199,886,903.58/90,133.09
  6. Step 6: Final answer
    x = 68,785.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.