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Finding the Fourth Proportional to 125,978.84, 173,850.76 and 69,390.21

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Solution

The fourth proportional to 125,978.84, 173,850.76 and 69,390.21 is: 95,758.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,978.84 : 173,850.76 = 69,390.21 : x
  2. Step 2: Convert to fraction form
    125,978.84/173,850.76 = 69,390.21/x
  3. Step 3: Cross multiply
    125,978.84x = 173,850.76 × 69,390.21
  4. Step 4: Simplify right side
    125,978.84x = 12,063,540,745.06
  5. Step 5: Solve for x
    x = 12,063,540,745.06/125,978.84
  6. Step 6: Final answer
    x = 95,758.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.