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Finding the Fourth Proportional to 58.11, 86.68 and 57.03

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Solution

The fourth proportional to 58.11, 86.68 and 57.03 is: 85.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.11 : 86.68 = 57.03 : x
  2. Step 2: Convert to fraction form
    58.11/86.68 = 57.03/x
  3. Step 3: Cross multiply
    58.11x = 86.68 × 57.03
  4. Step 4: Simplify right side
    58.11x = 4,943.36
  5. Step 5: Solve for x
    x = 4,943.36/58.11
  6. Step 6: Final answer
    x = 85.07

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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.