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Finding the Fourth Proportional to 58.87, 81.38 and 58.35

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Solution

The fourth proportional to 58.87, 81.38 and 58.35 is: 80.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.87 : 81.38 = 58.35 : x
  2. Step 2: Convert to fraction form
    58.87/81.38 = 58.35/x
  3. Step 3: Cross multiply
    58.87x = 81.38 × 58.35
  4. Step 4: Simplify right side
    58.87x = 4,748.52
  5. Step 5: Solve for x
    x = 4,748.52/58.87
  6. Step 6: Final answer
    x = 80.66

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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.