Home / 280,780.80-421,048.32-83,742.72

Finding the Fourth Proportional to 280,780.80, 421,048.32 and 83,742.72

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Solution

The fourth proportional to 280,780.80, 421,048.32 and 83,742.72 is: 125,577.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,780.80 : 421,048.32 = 83,742.72 : x
  2. Step 2: Convert to fraction form
    280,780.80/421,048.32 = 83,742.72/x
  3. Step 3: Cross multiply
    280,780.80x = 421,048.32 × 83,742.72
  4. Step 4: Simplify right side
    280,780.80x = 35,259,731,568.23
  5. Step 5: Solve for x
    x = 35,259,731,568.23/280,780.80
  6. Step 6: Final answer
    x = 125,577.43

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1.5x scale

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.