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Finding the Fourth Proportional to 92.30, 127.35 and 57.31

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Solution

The fourth proportional to 92.30, 127.35 and 57.31 is: 79.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.30 : 127.35 = 57.31 : x
  2. Step 2: Convert to fraction form
    92.30/127.35 = 57.31/x
  3. Step 3: Cross multiply
    92.30x = 127.35 × 57.31
  4. Step 4: Simplify right side
    92.30x = 7,298.11
  5. Step 5: Solve for x
    x = 7,298.11/92.30
  6. Step 6: Final answer
    x = 79.07

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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.