Home / 315,861.27-435,888.79-172,621.33

Finding the Fourth Proportional to 315,861.27, 435,888.79 and 172,621.33

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Solution

The fourth proportional to 315,861.27, 435,888.79 and 172,621.33 is: 238,217.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,861.27 : 435,888.79 = 172,621.33 : x
  2. Step 2: Convert to fraction form
    315,861.27/435,888.79 = 172,621.33/x
  3. Step 3: Cross multiply
    315,861.27x = 435,888.79 × 172,621.33
  4. Step 4: Simplify right side
    315,861.27x = 75,243,702,111.61
  5. Step 5: Solve for x
    x = 75,243,702,111.61/315,861.27
  6. Step 6: Final answer
    x = 238,217.56

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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.