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Finding the Fourth Proportional to 125.04, 187.56 and 76.89

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Solution

The fourth proportional to 125.04, 187.56 and 76.89 is: 115.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.04 : 187.56 = 76.89 : x
  2. Step 2: Convert to fraction form
    125.04/187.56 = 76.89/x
  3. Step 3: Cross multiply
    125.04x = 187.56 × 76.89
  4. Step 4: Simplify right side
    125.04x = 14,421.49
  5. Step 5: Solve for x
    x = 14,421.49/125.04
  6. Step 6: Final answer
    x = 115.34

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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.