Home / 318,102.09-438,983.97-172,908.51

Finding the Fourth Proportional to 318,102.09, 438,983.97 and 172,908.51

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Solution

The fourth proportional to 318,102.09, 438,983.97 and 172,908.51 is: 238,615.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,102.09 : 438,983.97 = 172,908.51 : x
  2. Step 2: Convert to fraction form
    318,102.09/438,983.97 = 172,908.51/x
  3. Step 3: Cross multiply
    318,102.09x = 438,983.97 × 172,908.51
  4. Step 4: Simplify right side
    318,102.09x = 75,904,064,166.58
  5. Step 5: Solve for x
    x = 75,904,064,166.58/318,102.09
  6. Step 6: Final answer
    x = 238,615.42

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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.