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Finding the Fourth Proportional to 48.63, 72.54 and 47.71

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Solution

The fourth proportional to 48.63, 72.54 and 47.71 is: 71.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.63 : 72.54 = 47.71 : x
  2. Step 2: Convert to fraction form
    48.63/72.54 = 47.71/x
  3. Step 3: Cross multiply
    48.63x = 72.54 × 47.71
  4. Step 4: Simplify right side
    48.63x = 3,460.88
  5. Step 5: Solve for x
    x = 3,460.88/48.63
  6. Step 6: Final answer
    x = 71.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.