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Finding the Fourth Proportional to 218,064.60, 327,096.90 and 138,943.80

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Solution

The fourth proportional to 218,064.60, 327,096.90 and 138,943.80 is: 208,415.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,064.60 : 327,096.90 = 138,943.80 : x
  2. Step 2: Convert to fraction form
    218,064.60/327,096.90 = 138,943.80/x
  3. Step 3: Cross multiply
    218,064.60x = 327,096.90 × 138,943.80
  4. Step 4: Simplify right side
    218,064.60x = 45,448,086,254.22
  5. Step 5: Solve for x
    x = 45,448,086,254.22/218,064.60
  6. Step 6: Final answer
    x = 208,415.70

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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.