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Finding the Fourth Proportional to 125,388.34, 173,035.90 and 71,674.50

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Solution

The fourth proportional to 125,388.34, 173,035.90 and 71,674.50 is: 98,910.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,388.34 : 173,035.90 = 71,674.50 : x
  2. Step 2: Convert to fraction form
    125,388.34/173,035.90 = 71,674.50/x
  3. Step 3: Cross multiply
    125,388.34x = 173,035.90 × 71,674.50
  4. Step 4: Simplify right side
    125,388.34x = 12,402,261,949.86
  5. Step 5: Solve for x
    x = 12,402,261,949.86/125,388.34
  6. Step 6: Final answer
    x = 98,910.81

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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.