Home / 280,087.80-420,186.32-90,595.12

Finding the Fourth Proportional to 280,087.80, 420,186.32 and 90,595.12

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Solution

The fourth proportional to 280,087.80, 420,186.32 and 90,595.12 is: 135,910.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,087.80 : 420,186.32 = 90,595.12 : x
  2. Step 2: Convert to fraction form
    280,087.80/420,186.32 = 90,595.12/x
  3. Step 3: Cross multiply
    280,087.80x = 420,186.32 × 90,595.12
  4. Step 4: Simplify right side
    280,087.80x = 38,066,830,082.76
  5. Step 5: Solve for x
    x = 38,066,830,082.76/280,087.80
  6. Step 6: Final answer
    x = 135,910.35

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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.