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Finding the Fourth Proportional to 315,696.10, 435,669.99 and 172,458.52

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Solution

The fourth proportional to 315,696.10, 435,669.99 and 172,458.52 is: 237,997.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,696.10 : 435,669.99 = 172,458.52 : x
  2. Step 2: Convert to fraction form
    315,696.10/435,669.99 = 172,458.52/x
  3. Step 3: Cross multiply
    315,696.10x = 435,669.99 × 172,458.52
  4. Step 4: Simplify right side
    315,696.10x = 75,135,001,683.81
  5. Step 5: Solve for x
    x = 75,135,001,683.81/315,696.10
  6. Step 6: Final answer
    x = 237,997.88

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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.