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Finding the Fourth Proportional to 218,714.88, 328,199.90 and 118,885.62

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Solution

The fourth proportional to 218,714.88, 328,199.90 and 118,885.62 is: 178,397.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,714.88 : 328,199.90 = 118,885.62 : x
  2. Step 2: Convert to fraction form
    218,714.88/328,199.90 = 118,885.62/x
  3. Step 3: Cross multiply
    218,714.88x = 328,199.90 × 118,885.62
  4. Step 4: Simplify right side
    218,714.88x = 39,018,249,900.49
  5. Step 5: Solve for x
    x = 39,018,249,900.49/218,714.88
  6. Step 6: Final answer
    x = 178,397.78

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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.