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Finding the Fourth Proportional to 145,629.20, 218,443.80 and 40,449.20

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Solution

The fourth proportional to 145,629.20, 218,443.80 and 40,449.20 is: 60,673.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,629.20 : 218,443.80 = 40,449.20 : x
  2. Step 2: Convert to fraction form
    145,629.20/218,443.80 = 40,449.20/x
  3. Step 3: Cross multiply
    145,629.20x = 218,443.80 × 40,449.20
  4. Step 4: Simplify right side
    145,629.20x = 8,835,876,954.96
  5. Step 5: Solve for x
    x = 8,835,876,954.96/145,629.20
  6. Step 6: Final answer
    x = 60,673.80

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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.