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Finding the Fourth Proportional to 79, 118.53 and 30.93

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Solution

The fourth proportional to 79, 118.53 and 30.93 is: 46.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79 : 118.53 = 30.93 : x
  2. Step 2: Convert to fraction form
    79/118.53 = 30.93/x
  3. Step 3: Cross multiply
    79x = 118.53 × 30.93
  4. Step 4: Simplify right side
    79x = 3,666.13
  5. Step 5: Solve for x
    x = 3,666.13/79
  6. Step 6: Final answer
    x = 46.41

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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.