Home / 280,295.12-420,509.66-90,755.69

Finding the Fourth Proportional to 280,295.12, 420,509.66 and 90,755.69

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Solution

The fourth proportional to 280,295.12, 420,509.66 and 90,755.69 is: 136,155.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,295.12 : 420,509.66 = 90,755.69 : x
  2. Step 2: Convert to fraction form
    280,295.12/420,509.66 = 90,755.69/x
  3. Step 3: Cross multiply
    280,295.12x = 420,509.66 × 90,755.69
  4. Step 4: Simplify right side
    280,295.12x = 38,163,645,623.13
  5. Step 5: Solve for x
    x = 38,163,645,623.13/280,295.12
  6. Step 6: Final answer
    x = 136,155.23

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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.