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Finding the Fourth Proportional to 105.60, 157.52 and 90.48

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Solution

The fourth proportional to 105.60, 157.52 and 90.48 is: 134.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.60 : 157.52 = 90.48 : x
  2. Step 2: Convert to fraction form
    105.60/157.52 = 90.48/x
  3. Step 3: Cross multiply
    105.60x = 157.52 × 90.48
  4. Step 4: Simplify right side
    105.60x = 14,252.41
  5. Step 5: Solve for x
    x = 14,252.41/105.60
  6. Step 6: Final answer
    x = 134.97

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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.