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Finding the Fourth Proportional to 218,956.88, 328,562.90 and 92,589.59

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Solution

The fourth proportional to 218,956.88, 328,562.90 and 92,589.59 is: 138,938.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,956.88 : 328,562.90 = 92,589.59 : x
  2. Step 2: Convert to fraction form
    218,956.88/328,562.90 = 92,589.59/x
  3. Step 3: Cross multiply
    218,956.88x = 328,562.90 × 92,589.59
  4. Step 4: Simplify right side
    218,956.88x = 30,421,502,094.45
  5. Step 5: Solve for x
    x = 30,421,502,094.45/218,956.88
  6. Step 6: Final answer
    x = 138,938.33

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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.