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Finding the Fourth Proportional to 315,781.37, 435,781.35 and 172,541.41

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Solution

The fourth proportional to 315,781.37, 435,781.35 and 172,541.41 is: 238,108.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,781.37 : 435,781.35 = 172,541.41 : x
  2. Step 2: Convert to fraction form
    315,781.37/435,781.35 = 172,541.41/x
  3. Step 3: Cross multiply
    315,781.37x = 435,781.35 × 172,541.41
  4. Step 4: Simplify right side
    315,781.37x = 75,190,327,491.25
  5. Step 5: Solve for x
    x = 75,190,327,491.25/315,781.37
  6. Step 6: Final answer
    x = 238,108.81

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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.