Home / 280,507.32-420,760.98-70,145.24

Finding the Fourth Proportional to 280,507.32, 420,760.98 and 70,145.24

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Solution

The fourth proportional to 280,507.32, 420,760.98 and 70,145.24 is: 105,217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,507.32 : 420,760.98 = 70,145.24 : x
  2. Step 2: Convert to fraction form
    280,507.32/420,760.98 = 70,145.24/x
  3. Step 3: Cross multiply
    280,507.32x = 420,760.98 × 70,145.24
  4. Step 4: Simplify right side
    280,507.32x = 29,514,377,820.93
  5. Step 5: Solve for x
    x = 29,514,377,820.93/280,507.32
  6. Step 6: Final answer
    x = 105,217.85

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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.