Home / 280,163.09-420,188.13-102,609.47

Finding the Fourth Proportional to 280,163.09, 420,188.13 and 102,609.47

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Solution

The fourth proportional to 280,163.09, 420,188.13 and 102,609.47 is: 153,893.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,163.09 : 420,188.13 = 102,609.47 : x
  2. Step 2: Convert to fraction form
    280,163.09/420,188.13 = 102,609.47/x
  3. Step 3: Cross multiply
    280,163.09x = 420,188.13 × 102,609.47
  4. Step 4: Simplify right side
    280,163.09x = 43,115,281,319.59
  5. Step 5: Solve for x
    x = 43,115,281,319.59/280,163.09
  6. Step 6: Final answer
    x = 153,893.51

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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.