Home / 255,921.33-383,938.16-78,441.69

Finding the Fourth Proportional to 255,921.33, 383,938.16 and 78,441.69

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Solution

The fourth proportional to 255,921.33, 383,938.16 and 78,441.69 is: 117,679.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,921.33 : 383,938.16 = 78,441.69 : x
  2. Step 2: Convert to fraction form
    255,921.33/383,938.16 = 78,441.69/x
  3. Step 3: Cross multiply
    255,921.33x = 383,938.16 × 78,441.69
  4. Step 4: Simplify right side
    255,921.33x = 30,116,758,125.89
  5. Step 5: Solve for x
    x = 30,116,758,125.89/255,921.33
  6. Step 6: Final answer
    x = 117,679.75

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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.