Home / 205,768.41-308,708.09-85,785.49

Finding the Fourth Proportional to 205,768.41, 308,708.09 and 85,785.49

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Solution

The fourth proportional to 205,768.41, 308,708.09 and 85,785.49 is: 128,701.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,768.41 : 308,708.09 = 85,785.49 : x
  2. Step 2: Convert to fraction form
    205,768.41/308,708.09 = 85,785.49/x
  3. Step 3: Cross multiply
    205,768.41x = 308,708.09 × 85,785.49
  4. Step 4: Simplify right side
    205,768.41x = 26,482,674,767.61
  5. Step 5: Solve for x
    x = 26,482,674,767.61/205,768.41
  6. Step 6: Final answer
    x = 128,701.36

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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.