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Finding the Fourth Proportional to 125,986.80, 173,871.60 and 69,408.32

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Solution

The fourth proportional to 125,986.80, 173,871.60 and 69,408.32 is: 95,788.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,986.80 : 173,871.60 = 69,408.32 : x
  2. Step 2: Convert to fraction form
    125,986.80/173,871.60 = 69,408.32/x
  3. Step 3: Cross multiply
    125,986.80x = 173,871.60 × 69,408.32
  4. Step 4: Simplify right side
    125,986.80x = 12,068,135,651.71
  5. Step 5: Solve for x
    x = 12,068,135,651.71/125,986.80
  6. Step 6: Final answer
    x = 95,788.89

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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.