Home / 230,949.12-318,703.66-128,971.76

Finding the Fourth Proportional to 230,949.12, 318,703.66 and 128,971.76

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Solution

The fourth proportional to 230,949.12, 318,703.66 and 128,971.76 is: 177,977.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,949.12 : 318,703.66 = 128,971.76 : x
  2. Step 2: Convert to fraction form
    230,949.12/318,703.66 = 128,971.76/x
  3. Step 3: Cross multiply
    230,949.12x = 318,703.66 × 128,971.76
  4. Step 4: Simplify right side
    230,949.12x = 41,103,771,948.64
  5. Step 5: Solve for x
    x = 41,103,771,948.64/230,949.12
  6. Step 6: Final answer
    x = 177,977.61

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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.