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Finding the Fourth Proportional to 58.42, 79.99 and 57.81

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Solution

The fourth proportional to 58.42, 79.99 and 57.81 is: 79.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.42 : 79.99 = 57.81 : x
  2. Step 2: Convert to fraction form
    58.42/79.99 = 57.81/x
  3. Step 3: Cross multiply
    58.42x = 79.99 × 57.81
  4. Step 4: Simplify right side
    58.42x = 4,624.38
  5. Step 5: Solve for x
    x = 4,624.38/58.42
  6. Step 6: Final answer
    x = 79.16

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.