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Finding the Fourth Proportional to 64,624.96, 89,190.40 and 36,330

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Solution

The fourth proportional to 64,624.96, 89,190.40 and 36,330 is: 50,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,624.96 : 89,190.40 = 36,330 : x
  2. Step 2: Convert to fraction form
    64,624.96/89,190.40 = 36,330/x
  3. Step 3: Cross multiply
    64,624.96x = 89,190.40 × 36,330
  4. Step 4: Simplify right side
    64,624.96x = 3,240,287,232
  5. Step 5: Solve for x
    x = 3,240,287,232/64,624.96
  6. Step 6: Final answer
    x = 50,139.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.