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Finding the Fourth Proportional to 173.40, 260.15 and 70.74

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Solution

The fourth proportional to 173.40, 260.15 and 70.74 is: 106.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.40 : 260.15 = 70.74 : x
  2. Step 2: Convert to fraction form
    173.40/260.15 = 70.74/x
  3. Step 3: Cross multiply
    173.40x = 260.15 × 70.74
  4. Step 4: Simplify right side
    173.40x = 18,403.01
  5. Step 5: Solve for x
    x = 18,403.01/173.40
  6. Step 6: Final answer
    x = 106.13

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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.