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Finding the Fourth Proportional to 116.53, 174.62 and 77.87

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Solution

The fourth proportional to 116.53, 174.62 and 77.87 is: 116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.53 : 174.62 = 77.87 : x
  2. Step 2: Convert to fraction form
    116.53/174.62 = 77.87/x
  3. Step 3: Cross multiply
    116.53x = 174.62 × 77.87
  4. Step 4: Simplify right side
    116.53x = 13,598.29
  5. Step 5: Solve for x
    x = 13,598.29/116.53
  6. Step 6: Final answer
    x = 116.70

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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.