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Finding the Fourth Proportional to 145.72, 218.38 and 125.07

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Solution

The fourth proportional to 145.72, 218.38 and 125.07 is: 187.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.72 : 218.38 = 125.07 : x
  2. Step 2: Convert to fraction form
    145.72/218.38 = 125.07/x
  3. Step 3: Cross multiply
    145.72x = 218.38 × 125.07
  4. Step 4: Simplify right side
    145.72x = 27,312.79
  5. Step 5: Solve for x
    x = 27,312.79/145.72
  6. Step 6: Final answer
    x = 187.43

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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.