Home / 72,780.21-100,435.65-40,949.04

Finding the Fourth Proportional to 72,780.21, 100,435.65 and 40,949.04

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Solution

The fourth proportional to 72,780.21, 100,435.65 and 40,949.04 is: 56,509.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,780.21 : 100,435.65 = 40,949.04 : x
  2. Step 2: Convert to fraction form
    72,780.21/100,435.65 = 40,949.04/x
  3. Step 3: Cross multiply
    72,780.21x = 100,435.65 × 40,949.04
  4. Step 4: Simplify right side
    72,780.21x = 4,112,743,449.28
  5. Step 5: Solve for x
    x = 4,112,743,449.28/72,780.21
  6. Step 6: Final answer
    x = 56,509.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.