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Finding the Fourth Proportional to 49.87, 69.02 and 42.99

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Solution

The fourth proportional to 49.87, 69.02 and 42.99 is: 59.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.87 : 69.02 = 42.99 : x
  2. Step 2: Convert to fraction form
    49.87/69.02 = 42.99/x
  3. Step 3: Cross multiply
    49.87x = 69.02 × 42.99
  4. Step 4: Simplify right side
    49.87x = 2,967.17
  5. Step 5: Solve for x
    x = 2,967.17/49.87
  6. Step 6: Final answer
    x = 59.50

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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.