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Finding the Fourth Proportional to 324,008.40, 486,012.60 and 87,342.60

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Solution

The fourth proportional to 324,008.40, 486,012.60 and 87,342.60 is: 131,013.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,008.40 : 486,012.60 = 87,342.60 : x
  2. Step 2: Convert to fraction form
    324,008.40/486,012.60 = 87,342.60/x
  3. Step 3: Cross multiply
    324,008.40x = 486,012.60 × 87,342.60
  4. Step 4: Simplify right side
    324,008.40x = 42,449,604,116.76
  5. Step 5: Solve for x
    x = 42,449,604,116.76/324,008.40
  6. Step 6: Final answer
    x = 131,013.90

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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.