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Finding the Fourth Proportional to 218,612.70, 328,014.35 and 76,559.88

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Solution

The fourth proportional to 218,612.70, 328,014.35 and 76,559.88 is: 114,873.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,612.70 : 328,014.35 = 76,559.88 : x
  2. Step 2: Convert to fraction form
    218,612.70/328,014.35 = 76,559.88/x
  3. Step 3: Cross multiply
    218,612.70x = 328,014.35 × 76,559.88
  4. Step 4: Simplify right side
    218,612.70x = 25,112,737,251.41
  5. Step 5: Solve for x
    x = 25,112,737,251.41/218,612.70
  6. Step 6: Final answer
    x = 114,873.19

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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.