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Finding the Fourth Proportional to 81,576.77, 122,485.27 and 45,623.67

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Solution

The fourth proportional to 81,576.77, 122,485.27 and 45,623.67 is: 68,502.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,576.77 : 122,485.27 = 45,623.67 : x
  2. Step 2: Convert to fraction form
    81,576.77/122,485.27 = 45,623.67/x
  3. Step 3: Cross multiply
    81,576.77x = 122,485.27 × 45,623.67
  4. Step 4: Simplify right side
    81,576.77x = 5,588,226,925.91
  5. Step 5: Solve for x
    x = 5,588,226,925.91/81,576.77
  6. Step 6: Final answer
    x = 68,502.67

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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.