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Finding the Fourth Proportional to 324,239.88, 486,341.46 and 87,564.72

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Solution

The fourth proportional to 324,239.88, 486,341.46 and 87,564.72 is: 131,342.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,239.88 : 486,341.46 = 87,564.72 : x
  2. Step 2: Convert to fraction form
    324,239.88/486,341.46 = 87,564.72/x
  3. Step 3: Cross multiply
    324,239.88x = 486,341.46 × 87,564.72
  4. Step 4: Simplify right side
    324,239.88x = 42,586,353,769.29
  5. Step 5: Solve for x
    x = 42,586,353,769.29/324,239.88
  6. Step 6: Final answer
    x = 131,342.12

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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.