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Finding the Fourth Proportional to 255,773.64, 383,661.28 and 78,279.96

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Solution

The fourth proportional to 255,773.64, 383,661.28 and 78,279.96 is: 117,420.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,773.64 : 383,661.28 = 78,279.96 : x
  2. Step 2: Convert to fraction form
    255,773.64/383,661.28 = 78,279.96/x
  3. Step 3: Cross multiply
    255,773.64x = 383,661.28 × 78,279.96
  4. Step 4: Simplify right side
    255,773.64x = 30,032,989,651.95
  5. Step 5: Solve for x
    x = 30,032,989,651.95/255,773.64
  6. Step 6: Final answer
    x = 117,420.19

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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.