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Finding the Fourth Proportional to 145.41, 218.12 and 73.19

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Solution

The fourth proportional to 145.41, 218.12 and 73.19 is: 109.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.41 : 218.12 = 73.19 : x
  2. Step 2: Convert to fraction form
    145.41/218.12 = 73.19/x
  3. Step 3: Cross multiply
    145.41x = 218.12 × 73.19
  4. Step 4: Simplify right side
    145.41x = 15,962.75
  5. Step 5: Solve for x
    x = 15,962.75/145.41
  6. Step 6: Final answer
    x = 109.78

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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.