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Finding the Fourth Proportional to 378,783.76, 568,229.64 and 125,980.96

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Solution

The fourth proportional to 378,783.76, 568,229.64 and 125,980.96 is: 188,989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,783.76 : 568,229.64 = 125,980.96 : x
  2. Step 2: Convert to fraction form
    378,783.76/568,229.64 = 125,980.96/x
  3. Step 3: Cross multiply
    378,783.76x = 568,229.64 × 125,980.96
  4. Step 4: Simplify right side
    378,783.76x = 71,586,115,547.65
  5. Step 5: Solve for x
    x = 71,586,115,547.65/378,783.76
  6. Step 6: Final answer
    x = 188,989.40

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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.