Home / 205,621.80-308,432.70-72,652.20

Finding the Fourth Proportional to 205,621.80, 308,432.70 and 72,652.20

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Solution

The fourth proportional to 205,621.80, 308,432.70 and 72,652.20 is: 108,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,621.80 : 308,432.70 = 72,652.20 : x
  2. Step 2: Convert to fraction form
    205,621.80/308,432.70 = 72,652.20/x
  3. Step 3: Cross multiply
    205,621.80x = 308,432.70 × 72,652.20
  4. Step 4: Simplify right side
    205,621.80x = 22,408,314,206.94
  5. Step 5: Solve for x
    x = 22,408,314,206.94/205,621.80
  6. Step 6: Final answer
    x = 108,978.30

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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.