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Finding the Fourth Proportional to 93.56, 129.25 and 77.99

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Solution

The fourth proportional to 93.56, 129.25 and 77.99 is: 107.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.56 : 129.25 = 77.99 : x
  2. Step 2: Convert to fraction form
    93.56/129.25 = 77.99/x
  3. Step 3: Cross multiply
    93.56x = 129.25 × 77.99
  4. Step 4: Simplify right side
    93.56x = 10,079.58
  5. Step 5: Solve for x
    x = 10,079.58/93.56
  6. Step 6: Final answer
    x = 107.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.