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Finding the Fourth Proportional to 48.04, 72.18 and 42.28

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Solution

The fourth proportional to 48.04, 72.18 and 42.28 is: 63.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.04 : 72.18 = 42.28 : x
  2. Step 2: Convert to fraction form
    48.04/72.18 = 42.28/x
  3. Step 3: Cross multiply
    48.04x = 72.18 × 42.28
  4. Step 4: Simplify right side
    48.04x = 3,051.77
  5. Step 5: Solve for x
    x = 3,051.77/48.04
  6. Step 6: Final answer
    x = 63.53

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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.