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Finding the Fourth Proportional to 125,419.73, 188,182.37 and 78,074.45

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Solution

The fourth proportional to 125,419.73, 188,182.37 and 78,074.45 is: 117,144.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,419.73 : 188,182.37 = 78,074.45 : x
  2. Step 2: Convert to fraction form
    125,419.73/188,182.37 = 78,074.45/x
  3. Step 3: Cross multiply
    125,419.73x = 188,182.37 × 78,074.45
  4. Step 4: Simplify right side
    125,419.73x = 14,692,233,706.16
  5. Step 5: Solve for x
    x = 14,692,233,706.16/125,419.73
  6. Step 6: Final answer
    x = 117,144.52

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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.