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Finding the Fourth Proportional to 58.76, 87.90 and 39.50

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Solution

The fourth proportional to 58.76, 87.90 and 39.50 is: 59.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.76 : 87.90 = 39.50 : x
  2. Step 2: Convert to fraction form
    58.76/87.90 = 39.50/x
  3. Step 3: Cross multiply
    58.76x = 87.90 × 39.50
  4. Step 4: Simplify right side
    58.76x = 3,472.05
  5. Step 5: Solve for x
    x = 3,472.05/58.76
  6. Step 6: Final answer
    x = 59.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.