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Finding the Fourth Proportional to 96,661.20, 145,008 and 30,085.68

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Solution

The fourth proportional to 96,661.20, 145,008 and 30,085.68 is: 45,133.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,661.20 : 145,008 = 30,085.68 : x
  2. Step 2: Convert to fraction form
    96,661.20/145,008 = 30,085.68/x
  3. Step 3: Cross multiply
    96,661.20x = 145,008 × 30,085.68
  4. Step 4: Simplify right side
    96,661.20x = 4,362,664,285.44
  5. Step 5: Solve for x
    x = 4,362,664,285.44/96,661.20
  6. Step 6: Final answer
    x = 45,133.56

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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.