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Finding the Fourth Proportional to 105.13, 157.76 and 48.13

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Solution

The fourth proportional to 105.13, 157.76 and 48.13 is: 72.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.13 : 157.76 = 48.13 : x
  2. Step 2: Convert to fraction form
    105.13/157.76 = 48.13/x
  3. Step 3: Cross multiply
    105.13x = 157.76 × 48.13
  4. Step 4: Simplify right side
    105.13x = 7,592.99
  5. Step 5: Solve for x
    x = 7,592.99/105.13
  6. Step 6: Final answer
    x = 72.22

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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.