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Finding the Fourth Proportional to 125.64, 188.55 and 71.60

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Solution

The fourth proportional to 125.64, 188.55 and 71.60 is: 107.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.64 : 188.55 = 71.60 : x
  2. Step 2: Convert to fraction form
    125.64/188.55 = 71.60/x
  3. Step 3: Cross multiply
    125.64x = 188.55 × 71.60
  4. Step 4: Simplify right side
    125.64x = 13,499.24
  5. Step 5: Solve for x
    x = 13,499.24/125.64
  6. Step 6: Final answer
    x = 107.44

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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.