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Finding the Fourth Proportional to 257,021.20, 385,617.90 and 88,657.74

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Solution

The fourth proportional to 257,021.20, 385,617.90 and 88,657.74 is: 133,016.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,021.20 : 385,617.90 = 88,657.74 : x
  2. Step 2: Convert to fraction form
    257,021.20/385,617.90 = 88,657.74/x
  3. Step 3: Cross multiply
    257,021.20x = 385,617.90 × 88,657.74
  4. Step 4: Simplify right side
    257,021.20x = 34,188,010,885.97
  5. Step 5: Solve for x
    x = 34,188,010,885.97/257,021.20
  6. Step 6: Final answer
    x = 133,016.31

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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.