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Finding the Fourth Proportional to 116.36, 174.62 and 70.80

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Solution

The fourth proportional to 116.36, 174.62 and 70.80 is: 106.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.36 : 174.62 = 70.80 : x
  2. Step 2: Convert to fraction form
    116.36/174.62 = 70.80/x
  3. Step 3: Cross multiply
    116.36x = 174.62 × 70.80
  4. Step 4: Simplify right side
    116.36x = 12,363.10
  5. Step 5: Solve for x
    x = 12,363.10/116.36
  6. Step 6: Final answer
    x = 106.25

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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.