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Finding the Fourth Proportional to 85,769.01, 128,771.30 and 43,677.36

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Solution

The fourth proportional to 85,769.01, 128,771.30 and 43,677.36 is: 65,576.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,769.01 : 128,771.30 = 43,677.36 : x
  2. Step 2: Convert to fraction form
    85,769.01/128,771.30 = 43,677.36/x
  3. Step 3: Cross multiply
    85,769.01x = 128,771.30 × 43,677.36
  4. Step 4: Simplify right side
    85,769.01x = 5,624,390,536.96
  5. Step 5: Solve for x
    x = 5,624,390,536.96/85,769.01
  6. Step 6: Final answer
    x = 65,576.02

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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.