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Finding the Fourth Proportional to 58.87, 81.21 and 43.35

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Solution

The fourth proportional to 58.87, 81.21 and 43.35 is: 59.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.87 : 81.21 = 43.35 : x
  2. Step 2: Convert to fraction form
    58.87/81.21 = 43.35/x
  3. Step 3: Cross multiply
    58.87x = 81.21 × 43.35
  4. Step 4: Simplify right side
    58.87x = 3,520.45
  5. Step 5: Solve for x
    x = 3,520.45/58.87
  6. Step 6: Final answer
    x = 59.80

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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.