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Finding the Fourth Proportional to 93.06, 138.89 and 90.63

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Solution

The fourth proportional to 93.06, 138.89 and 90.63 is: 135.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.06 : 138.89 = 90.63 : x
  2. Step 2: Convert to fraction form
    93.06/138.89 = 90.63/x
  3. Step 3: Cross multiply
    93.06x = 138.89 × 90.63
  4. Step 4: Simplify right side
    93.06x = 12,587.32
  5. Step 5: Solve for x
    x = 12,587.32/93.06
  6. Step 6: Final answer
    x = 135.26

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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.