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Finding the Fourth Proportional to 148.69, 223.07 and 56.15

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Solution

The fourth proportional to 148.69, 223.07 and 56.15 is: 84.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.69 : 223.07 = 56.15 : x
  2. Step 2: Convert to fraction form
    148.69/223.07 = 56.15/x
  3. Step 3: Cross multiply
    148.69x = 223.07 × 56.15
  4. Step 4: Simplify right side
    148.69x = 12,525.66
  5. Step 5: Solve for x
    x = 12,525.66/148.69
  6. Step 6: Final answer
    x = 84.24

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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.