Home / 230,961.78-318,758.90-128,993.51

Finding the Fourth Proportional to 230,961.78, 318,758.90 and 128,993.51

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Solution

The fourth proportional to 230,961.78, 318,758.90 and 128,993.51 is: 178,028.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,961.78 : 318,758.90 = 128,993.51 : x
  2. Step 2: Convert to fraction form
    230,961.78/318,758.90 = 128,993.51/x
  3. Step 3: Cross multiply
    230,961.78x = 318,758.90 × 128,993.51
  4. Step 4: Simplify right side
    230,961.78x = 41,117,829,506.67
  5. Step 5: Solve for x
    x = 41,117,829,506.67/230,961.78
  6. Step 6: Final answer
    x = 178,028.72

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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.