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Finding the Fourth Proportional to 125,885.78, 188,828.68 and 120,419.14

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Solution

The fourth proportional to 125,885.78, 188,828.68 and 120,419.14 is: 180,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,885.78 : 188,828.68 = 120,419.14 : x
  2. Step 2: Convert to fraction form
    125,885.78/188,828.68 = 120,419.14/x
  3. Step 3: Cross multiply
    125,885.78x = 188,828.68 × 120,419.14
  4. Step 4: Simplify right side
    125,885.78x = 22,738,587,252.94
  5. Step 5: Solve for x
    x = 22,738,587,252.94/125,885.78
  6. Step 6: Final answer
    x = 180,628.72

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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.