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Finding the Fourth Proportional to 93.94, 139.93 and 89.57

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Solution

The fourth proportional to 93.94, 139.93 and 89.57 is: 133.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.94 : 139.93 = 89.57 : x
  2. Step 2: Convert to fraction form
    93.94/139.93 = 89.57/x
  3. Step 3: Cross multiply
    93.94x = 139.93 × 89.57
  4. Step 4: Simplify right side
    93.94x = 12,533.66
  5. Step 5: Solve for x
    x = 12,533.66/93.94
  6. Step 6: Final answer
    x = 133.43

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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.