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Finding the Fourth Proportional to 175.89, 242.90 and 139.31

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Solution

The fourth proportional to 175.89, 242.90 and 139.31 is: 192.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.89 : 242.90 = 139.31 : x
  2. Step 2: Convert to fraction form
    175.89/242.90 = 139.31/x
  3. Step 3: Cross multiply
    175.89x = 242.90 × 139.31
  4. Step 4: Simplify right side
    175.89x = 33,838.40
  5. Step 5: Solve for x
    x = 33,838.40/175.89
  6. Step 6: Final answer
    x = 192.38

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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.