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Finding the Fourth Proportional to 144,469.90, 216,618.45 and 74,485.90

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Solution

The fourth proportional to 144,469.90, 216,618.45 and 74,485.90 is: 111,684.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,469.90 : 216,618.45 = 74,485.90 : x
  2. Step 2: Convert to fraction form
    144,469.90/216,618.45 = 74,485.90/x
  3. Step 3: Cross multiply
    144,469.90x = 216,618.45 × 74,485.90
  4. Step 4: Simplify right side
    144,469.90x = 16,135,020,204.86
  5. Step 5: Solve for x
    x = 16,135,020,204.86/144,469.90
  6. Step 6: Final answer
    x = 111,684.30

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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.