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Finding the Fourth Proportional to 303,128.90, 418,315.34 and 167,168.51

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Solution

The fourth proportional to 303,128.90, 418,315.34 and 167,168.51 is: 230,691.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,128.90 : 418,315.34 = 167,168.51 : x
  2. Step 2: Convert to fraction form
    303,128.90/418,315.34 = 167,168.51/x
  3. Step 3: Cross multiply
    303,128.90x = 418,315.34 × 167,168.51
  4. Step 4: Simplify right side
    303,128.90x = 69,929,149,170.52
  5. Step 5: Solve for x
    x = 69,929,149,170.52/303,128.90
  6. Step 6: Final answer
    x = 230,691.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.