Home / 128,928.12-193,312.78-44,668.68

Finding the Fourth Proportional to 128,928.12, 193,312.78 and 44,668.68

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Solution

The fourth proportional to 128,928.12, 193,312.78 and 44,668.68 is: 66,975.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,928.12 : 193,312.78 = 44,668.68 : x
  2. Step 2: Convert to fraction form
    128,928.12/193,312.78 = 44,668.68/x
  3. Step 3: Cross multiply
    128,928.12x = 193,312.78 × 44,668.68
  4. Step 4: Simplify right side
    128,928.12x = 8,635,026,709.73
  5. Step 5: Solve for x
    x = 8,635,026,709.73/128,928.12
  6. Step 6: Final answer
    x = 66,975.51

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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.