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Finding the Fourth Proportional to 315,297.84, 435,120.18 and 172,067.08

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Solution

The fourth proportional to 315,297.84, 435,120.18 and 172,067.08 is: 237,457.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,297.84 : 435,120.18 = 172,067.08 : x
  2. Step 2: Convert to fraction form
    315,297.84/435,120.18 = 172,067.08/x
  3. Step 3: Cross multiply
    315,297.84x = 435,120.18 × 172,067.08
  4. Step 4: Simplify right side
    315,297.84x = 74,869,858,821.67
  5. Step 5: Solve for x
    x = 74,869,858,821.67/315,297.84
  6. Step 6: Final answer
    x = 237,457.57

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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.