Home / 218,880.32-328,125.60-85,855.52

Finding the Fourth Proportional to 218,880.32, 328,125.60 and 85,855.52

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Solution

The fourth proportional to 218,880.32, 328,125.60 and 85,855.52 is: 128,706.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,880.32 : 328,125.60 = 85,855.52 : x
  2. Step 2: Convert to fraction form
    218,880.32/328,125.60 = 85,855.52/x
  3. Step 3: Cross multiply
    218,880.32x = 328,125.60 × 85,855.52
  4. Step 4: Simplify right side
    218,880.32x = 28,171,394,013.31
  5. Step 5: Solve for x
    x = 28,171,394,013.31/218,880.32
  6. Step 6: Final answer
    x = 128,706.84

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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.