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Finding the Fourth Proportional to 152.73, 210.81 and 139.51

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Solution

The fourth proportional to 152.73, 210.81 and 139.51 is: 192.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.73 : 210.81 = 139.51 : x
  2. Step 2: Convert to fraction form
    152.73/210.81 = 139.51/x
  3. Step 3: Cross multiply
    152.73x = 210.81 × 139.51
  4. Step 4: Simplify right side
    152.73x = 29,410.10
  5. Step 5: Solve for x
    x = 29,410.10/152.73
  6. Step 6: Final answer
    x = 192.56

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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.