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Finding the Fourth Proportional to 152.41, 229.81 and 139.65

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Solution

The fourth proportional to 152.41, 229.81 and 139.65 is: 210.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.41 : 229.81 = 139.65 : x
  2. Step 2: Convert to fraction form
    152.41/229.81 = 139.65/x
  3. Step 3: Cross multiply
    152.41x = 229.81 × 139.65
  4. Step 4: Simplify right side
    152.41x = 32,092.17
  5. Step 5: Solve for x
    x = 32,092.17/152.41
  6. Step 6: Final answer
    x = 210.57

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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.