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Finding the Fourth Proportional to 85,492.67, 128,241.20 and 40,503.48

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Solution

The fourth proportional to 85,492.67, 128,241.20 and 40,503.48 is: 60,756.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,492.67 : 128,241.20 = 40,503.48 : x
  2. Step 2: Convert to fraction form
    85,492.67/128,241.20 = 40,503.48/x
  3. Step 3: Cross multiply
    85,492.67x = 128,241.20 × 40,503.48
  4. Step 4: Simplify right side
    85,492.67x = 5,194,214,676.86
  5. Step 5: Solve for x
    x = 5,194,214,676.86/85,492.67
  6. Step 6: Final answer
    x = 60,756.26

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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.