Home / 145,405.20-218,107.79-40,221.43

Finding the Fourth Proportional to 145,405.20, 218,107.79 and 40,221.43

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Solution

The fourth proportional to 145,405.20, 218,107.79 and 40,221.43 is: 60,332.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,405.20 : 218,107.79 = 40,221.43 : x
  2. Step 2: Convert to fraction form
    145,405.20/218,107.79 = 40,221.43/x
  3. Step 3: Cross multiply
    145,405.20x = 218,107.79 × 40,221.43
  4. Step 4: Simplify right side
    145,405.20x = 8,772,607,207.94
  5. Step 5: Solve for x
    x = 8,772,607,207.94/145,405.20
  6. Step 6: Final answer
    x = 60,332.14

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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.