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Finding the Fourth Proportional to 169.47, 233.58 and 139.89

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Solution

The fourth proportional to 169.47, 233.58 and 139.89 is: 192.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.47 : 233.58 = 139.89 : x
  2. Step 2: Convert to fraction form
    169.47/233.58 = 139.89/x
  3. Step 3: Cross multiply
    169.47x = 233.58 × 139.89
  4. Step 4: Simplify right side
    169.47x = 32,675.51
  5. Step 5: Solve for x
    x = 32,675.51/169.47
  6. Step 6: Final answer
    x = 192.81

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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.