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Finding the Fourth Proportional to 315,761.17, 435,745.33 and 172,518.14

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Solution

The fourth proportional to 315,761.17, 435,745.33 and 172,518.14 is: 238,072.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,761.17 : 435,745.33 = 172,518.14 : x
  2. Step 2: Convert to fraction form
    315,761.17/435,745.33 = 172,518.14/x
  3. Step 3: Cross multiply
    315,761.17x = 435,745.33 × 172,518.14
  4. Step 4: Simplify right side
    315,761.17x = 75,173,973,845.29
  5. Step 5: Solve for x
    x = 75,173,973,845.29/315,761.17
  6. Step 6: Final answer
    x = 238,072.26

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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.