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Finding the Fourth Proportional to 255,999.50, 383,984.85 and 78,506.03

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Solution

The fourth proportional to 255,999.50, 383,984.85 and 78,506.03 is: 117,754.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,999.50 : 383,984.85 = 78,506.03 : x
  2. Step 2: Convert to fraction form
    255,999.50/383,984.85 = 78,506.03/x
  3. Step 3: Cross multiply
    255,999.50x = 383,984.85 × 78,506.03
  4. Step 4: Simplify right side
    255,999.50x = 30,145,126,153.65
  5. Step 5: Solve for x
    x = 30,145,126,153.65/255,999.50
  6. Step 6: Final answer
    x = 117,754.63

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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.