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Finding the Fourth Proportional to 93.04, 128.95 and 91.84

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Solution

The fourth proportional to 93.04, 128.95 and 91.84 is: 127.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.04 : 128.95 = 91.84 : x
  2. Step 2: Convert to fraction form
    93.04/128.95 = 91.84/x
  3. Step 3: Cross multiply
    93.04x = 128.95 × 91.84
  4. Step 4: Simplify right side
    93.04x = 11,842.77
  5. Step 5: Solve for x
    x = 11,842.77/93.04
  6. Step 6: Final answer
    x = 127.29

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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.