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Finding the Fourth Proportional to 81,677.81, 122,401.80 and 64,963.67

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Solution

The fourth proportional to 81,677.81, 122,401.80 and 64,963.67 is: 97,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,677.81 : 122,401.80 = 64,963.67 : x
  2. Step 2: Convert to fraction form
    81,677.81/122,401.80 = 64,963.67/x
  3. Step 3: Cross multiply
    81,677.81x = 122,401.80 × 64,963.67
  4. Step 4: Simplify right side
    81,677.81x = 7,951,669,530.60
  5. Step 5: Solve for x
    x = 7,951,669,530.60/81,677.81
  6. Step 6: Final answer
    x = 97,354.10

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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.