Home / 280,359.42-420,518.79-109,549.03

Finding the Fourth Proportional to 280,359.42, 420,518.79 and 109,549.03

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Solution

The fourth proportional to 280,359.42, 420,518.79 and 109,549.03 is: 164,315.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,359.42 : 420,518.79 = 109,549.03 : x
  2. Step 2: Convert to fraction form
    280,359.42/420,518.79 = 109,549.03/x
  3. Step 3: Cross multiply
    280,359.42x = 420,518.79 × 109,549.03
  4. Step 4: Simplify right side
    280,359.42x = 46,067,425,541.27
  5. Step 5: Solve for x
    x = 46,067,425,541.27/280,359.42
  6. Step 6: Final answer
    x = 164,315.60

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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.