Home / 255,719.90-383,518.26-78,228.45

Finding the Fourth Proportional to 255,719.90, 383,518.26 and 78,228.45

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Solution

The fourth proportional to 255,719.90, 383,518.26 and 78,228.45 is: 117,323.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,719.90 : 383,518.26 = 78,228.45 : x
  2. Step 2: Convert to fraction form
    255,719.90/383,518.26 = 78,228.45/x
  3. Step 3: Cross multiply
    255,719.90x = 383,518.26 × 78,228.45
  4. Step 4: Simplify right side
    255,719.90x = 30,002,039,026.50
  5. Step 5: Solve for x
    x = 30,002,039,026.50/255,719.90
  6. Step 6: Final answer
    x = 117,323.83

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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.