Home / 218,949.20-328,421.81-69,189.51

Finding the Fourth Proportional to 218,949.20, 328,421.81 and 69,189.51

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Solution

The fourth proportional to 218,949.20, 328,421.81 and 69,189.51 is: 103,783.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,949.20 : 328,421.81 = 69,189.51 : x
  2. Step 2: Convert to fraction form
    218,949.20/328,421.81 = 69,189.51/x
  3. Step 3: Cross multiply
    218,949.20x = 328,421.81 × 69,189.51
  4. Step 4: Simplify right side
    218,949.20x = 22,723,343,761.27
  5. Step 5: Solve for x
    x = 22,723,343,761.27/218,949.20
  6. Step 6: Final answer
    x = 103,783.64

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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.