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Finding the Fourth Proportional to 145.56, 219.09 and 127.92

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Solution

The fourth proportional to 145.56, 219.09 and 127.92 is: 192.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.56 : 219.09 = 127.92 : x
  2. Step 2: Convert to fraction form
    145.56/219.09 = 127.92/x
  3. Step 3: Cross multiply
    145.56x = 219.09 × 127.92
  4. Step 4: Simplify right side
    145.56x = 28,025.99
  5. Step 5: Solve for x
    x = 28,025.99/145.56
  6. Step 6: Final answer
    x = 192.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.