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Finding the Fourth Proportional to 172,605.90, 238,174.11 and 97,139.82

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Solution

The fourth proportional to 172,605.90, 238,174.11 and 97,139.82 is: 134,040.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,605.90 : 238,174.11 = 97,139.82 : x
  2. Step 2: Convert to fraction form
    172,605.90/238,174.11 = 97,139.82/x
  3. Step 3: Cross multiply
    172,605.90x = 238,174.11 × 97,139.82
  4. Step 4: Simplify right side
    172,605.90x = 23,136,190,174.06
  5. Step 5: Solve for x
    x = 23,136,190,174.06/172,605.90
  6. Step 6: Final answer
    x = 134,040.55

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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.