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Finding the Fourth Proportional to 114,912.80, 172,385.40 and 36,018.80

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Solution

The fourth proportional to 114,912.80, 172,385.40 and 36,018.80 is: 54,033.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,912.80 : 172,385.40 = 36,018.80 : x
  2. Step 2: Convert to fraction form
    114,912.80/172,385.40 = 36,018.80/x
  3. Step 3: Cross multiply
    114,912.80x = 172,385.40 × 36,018.80
  4. Step 4: Simplify right side
    114,912.80x = 6,209,115,245.52
  5. Step 5: Solve for x
    x = 6,209,115,245.52/114,912.80
  6. Step 6: Final answer
    x = 54,033.28

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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.