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Finding the Fourth Proportional to 85,401.76, 128,102.64 and 41,000.80

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Solution

The fourth proportional to 85,401.76, 128,102.64 and 41,000.80 is: 61,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,401.76 : 128,102.64 = 41,000.80 : x
  2. Step 2: Convert to fraction form
    85,401.76/128,102.64 = 41,000.80/x
  3. Step 3: Cross multiply
    85,401.76x = 128,102.64 × 41,000.80
  4. Step 4: Simplify right side
    85,401.76x = 5,252,310,722.11
  5. Step 5: Solve for x
    x = 5,252,310,722.11/85,401.76
  6. Step 6: Final answer
    x = 61,501.20

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Similar ratio
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1.5x scale

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.