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Finding the Fourth Proportional to 147.48, 220.86 and 127.08

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Solution

The fourth proportional to 147.48, 220.86 and 127.08 is: 190.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.48 : 220.86 = 127.08 : x
  2. Step 2: Convert to fraction form
    147.48/220.86 = 127.08/x
  3. Step 3: Cross multiply
    147.48x = 220.86 × 127.08
  4. Step 4: Simplify right side
    147.48x = 28,066.89
  5. Step 5: Solve for x
    x = 28,066.89/147.48
  6. Step 6: Final answer
    x = 190.31

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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.