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Finding the Fourth Proportional to 218,434.68, 327,670.95 and 66,665.90

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Solution

The fourth proportional to 218,434.68, 327,670.95 and 66,665.90 is: 100,004.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,434.68 : 327,670.95 = 66,665.90 : x
  2. Step 2: Convert to fraction form
    218,434.68/327,670.95 = 66,665.90/x
  3. Step 3: Cross multiply
    218,434.68x = 327,670.95 × 66,665.90
  4. Step 4: Simplify right side
    218,434.68x = 21,844,478,785.61
  5. Step 5: Solve for x
    x = 21,844,478,785.61/218,434.68
  6. Step 6: Final answer
    x = 100,004.63

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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.