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Finding the Fourth Proportional to 145.95, 219.40 and 120.46

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Solution

The fourth proportional to 145.95, 219.40 and 120.46 is: 181.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.95 : 219.40 = 120.46 : x
  2. Step 2: Convert to fraction form
    145.95/219.40 = 120.46/x
  3. Step 3: Cross multiply
    145.95x = 219.40 × 120.46
  4. Step 4: Simplify right side
    145.95x = 26,428.92
  5. Step 5: Solve for x
    x = 26,428.92/145.95
  6. Step 6: Final answer
    x = 181.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.