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Finding the Fourth Proportional to 170.69, 235.63 and 139.93

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Solution

The fourth proportional to 170.69, 235.63 and 139.93 is: 193.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.69 : 235.63 = 139.93 : x
  2. Step 2: Convert to fraction form
    170.69/235.63 = 139.93/x
  3. Step 3: Cross multiply
    170.69x = 235.63 × 139.93
  4. Step 4: Simplify right side
    170.69x = 32,971.29
  5. Step 5: Solve for x
    x = 32,971.29/170.69
  6. Step 6: Final answer
    x = 193.17

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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.