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Finding the Fourth Proportional to 378,673.90, 568,128.72 and 112,435.81

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Solution

The fourth proportional to 378,673.90, 568,128.72 and 112,435.81 is: 168,688.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,673.90 : 568,128.72 = 112,435.81 : x
  2. Step 2: Convert to fraction form
    378,673.90/568,128.72 = 112,435.81/x
  3. Step 3: Cross multiply
    378,673.90x = 568,128.72 × 112,435.81
  4. Step 4: Simplify right side
    378,673.90x = 63,878,012,817.46
  5. Step 5: Solve for x
    x = 63,878,012,817.46/378,673.90
  6. Step 6: Final answer
    x = 168,688.71

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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.