Home / 280,675.08-421,082.28-80,990.64

Finding the Fourth Proportional to 280,675.08, 421,082.28 and 80,990.64

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Solution

The fourth proportional to 280,675.08, 421,082.28 and 80,990.64 is: 121,506.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,675.08 : 421,082.28 = 80,990.64 : x
  2. Step 2: Convert to fraction form
    280,675.08/421,082.28 = 80,990.64/x
  3. Step 3: Cross multiply
    280,675.08x = 421,082.28 × 80,990.64
  4. Step 4: Simplify right side
    280,675.08x = 34,103,723,349.86
  5. Step 5: Solve for x
    x = 34,103,723,349.86/280,675.08
  6. Step 6: Final answer
    x = 121,506.06

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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.