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Finding the Fourth Proportional to 255,993.55, 383,975.96 and 78,500.07

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Solution

The fourth proportional to 255,993.55, 383,975.96 and 78,500.07 is: 117,745.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,993.55 : 383,975.96 = 78,500.07 : x
  2. Step 2: Convert to fraction form
    255,993.55/383,975.96 = 78,500.07/x
  3. Step 3: Cross multiply
    255,993.55x = 383,975.96 × 78,500.07
  4. Step 4: Simplify right side
    255,993.55x = 30,142,139,345.82
  5. Step 5: Solve for x
    x = 30,142,139,345.82/255,993.55
  6. Step 6: Final answer
    x = 117,745.70

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1.5x scale

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.