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Finding the Fourth Proportional to 255,729.12, 383,579.73 and 78,236.15

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Solution

The fourth proportional to 255,729.12, 383,579.73 and 78,236.15 is: 117,349.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,729.12 : 383,579.73 = 78,236.15 : x
  2. Step 2: Convert to fraction form
    255,729.12/383,579.73 = 78,236.15/x
  3. Step 3: Cross multiply
    255,729.12x = 383,579.73 × 78,236.15
  4. Step 4: Simplify right side
    255,729.12x = 30,009,800,902.06
  5. Step 5: Solve for x
    x = 30,009,800,902.06/255,729.12
  6. Step 6: Final answer
    x = 117,349.96

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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.