Home / 280,126.28-420,189.19-102,647.18

Finding the Fourth Proportional to 280,126.28, 420,189.19 and 102,647.18

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Solution

The fourth proportional to 280,126.28, 420,189.19 and 102,647.18 is: 153,970.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,126.28 : 420,189.19 = 102,647.18 : x
  2. Step 2: Convert to fraction form
    280,126.28/420,189.19 = 102,647.18/x
  3. Step 3: Cross multiply
    280,126.28x = 420,189.19 × 102,647.18
  4. Step 4: Simplify right side
    280,126.28x = 43,131,236,213.84
  5. Step 5: Solve for x
    x = 43,131,236,213.84/280,126.28
  6. Step 6: Final answer
    x = 153,970.69

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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.