Home / 280,085.04-420,126.75-120,057.12

Finding the Fourth Proportional to 280,085.04, 420,126.75 and 120,057.12

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Solution

The fourth proportional to 280,085.04, 420,126.75 and 120,057.12 is: 180,085.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,085.04 : 420,126.75 = 120,057.12 : x
  2. Step 2: Convert to fraction form
    280,085.04/420,126.75 = 120,057.12/x
  3. Step 3: Cross multiply
    280,085.04x = 420,126.75 × 120,057.12
  4. Step 4: Simplify right side
    280,085.04x = 50,439,207,639.96
  5. Step 5: Solve for x
    x = 50,439,207,639.96/280,085.04
  6. Step 6: Final answer
    x = 180,085.33

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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.