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Finding the Fourth Proportional to 280,545.48, 420,921.90 and 103,168.44

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Solution

The fourth proportional to 280,545.48, 420,921.90 and 103,168.44 is: 154,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,545.48 : 420,921.90 = 103,168.44 : x
  2. Step 2: Convert to fraction form
    280,545.48/420,921.90 = 103,168.44/x
  3. Step 3: Cross multiply
    280,545.48x = 420,921.90 × 103,168.44
  4. Step 4: Simplify right side
    280,545.48x = 43,425,855,784.84
  5. Step 5: Solve for x
    x = 43,425,855,784.84/280,545.48
  6. Step 6: Final answer
    x = 154,790.79

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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.