Home / 280,172.76-420,313.14-90,680.16

Finding the Fourth Proportional to 280,172.76, 420,313.14 and 90,680.16

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Solution

The fourth proportional to 280,172.76, 420,313.14 and 90,680.16 is: 136,037.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,172.76 : 420,313.14 = 90,680.16 : x
  2. Step 2: Convert to fraction form
    280,172.76/420,313.14 = 90,680.16/x
  3. Step 3: Cross multiply
    280,172.76x = 420,313.14 × 90,680.16
  4. Step 4: Simplify right side
    280,172.76x = 38,114,062,785.30
  5. Step 5: Solve for x
    x = 38,114,062,785.30/280,172.76
  6. Step 6: Final answer
    x = 136,037.72

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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.