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Finding the Fourth Proportional to 58.70, 81.06 and 49.04

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Solution

The fourth proportional to 58.70, 81.06 and 49.04 is: 67.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.70 : 81.06 = 49.04 : x
  2. Step 2: Convert to fraction form
    58.70/81.06 = 49.04/x
  3. Step 3: Cross multiply
    58.70x = 81.06 × 49.04
  4. Step 4: Simplify right side
    58.70x = 3,975.18
  5. Step 5: Solve for x
    x = 3,975.18/58.70
  6. Step 6: Final answer
    x = 67.72

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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.