Home / 280,077.08-420,012.69-100,113.95

Finding the Fourth Proportional to 280,077.08, 420,012.69 and 100,113.95

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Solution

The fourth proportional to 280,077.08, 420,012.69 and 100,113.95 is: 150,134.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,077.08 : 420,012.69 = 100,113.95 : x
  2. Step 2: Convert to fraction form
    280,077.08/420,012.69 = 100,113.95/x
  3. Step 3: Cross multiply
    280,077.08x = 420,012.69 × 100,113.95
  4. Step 4: Simplify right side
    280,077.08x = 42,049,127,345.96
  5. Step 5: Solve for x
    x = 42,049,127,345.96/280,077.08
  6. Step 6: Final answer
    x = 150,134.13

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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.