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Finding the Fourth Proportional to 103.73, 143.19 and 70.93

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Solution

The fourth proportional to 103.73, 143.19 and 70.93 is: 97.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.73 : 143.19 = 70.93 : x
  2. Step 2: Convert to fraction form
    103.73/143.19 = 70.93/x
  3. Step 3: Cross multiply
    103.73x = 143.19 × 70.93
  4. Step 4: Simplify right side
    103.73x = 10,156.47
  5. Step 5: Solve for x
    x = 10,156.47/103.73
  6. Step 6: Final answer
    x = 97.91

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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.