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Finding the Fourth Proportional to 93.60, 130.01 and 90.54

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Solution

The fourth proportional to 93.60, 130.01 and 90.54 is: 125.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.60 : 130.01 = 90.54 : x
  2. Step 2: Convert to fraction form
    93.60/130.01 = 90.54/x
  3. Step 3: Cross multiply
    93.60x = 130.01 × 90.54
  4. Step 4: Simplify right side
    93.60x = 11,770.65
  5. Step 5: Solve for x
    x = 11,770.65/93.60
  6. Step 6: Final answer
    x = 125.75

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.