Home / 100,794.09-139,101.57-57,780.73

Finding the Fourth Proportional to 100,794.09, 139,101.57 and 57,780.73

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Solution

The fourth proportional to 100,794.09, 139,101.57 and 57,780.73 is: 79,740.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,794.09 : 139,101.57 = 57,780.73 : x
  2. Step 2: Convert to fraction form
    100,794.09/139,101.57 = 57,780.73/x
  3. Step 3: Cross multiply
    100,794.09x = 139,101.57 × 57,780.73
  4. Step 4: Simplify right side
    100,794.09x = 8,037,390,258.75
  5. Step 5: Solve for x
    x = 8,037,390,258.75/100,794.09
  6. Step 6: Final answer
    x = 79,740.69

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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.