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Finding the Fourth Proportional to 420,039.68, 630,000.39 and 120,545.96

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Solution

The fourth proportional to 420,039.68, 630,000.39 and 120,545.96 is: 180,801.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,039.68 : 630,000.39 = 120,545.96 : x
  2. Step 2: Convert to fraction form
    420,039.68/630,000.39 = 120,545.96/x
  3. Step 3: Cross multiply
    420,039.68x = 630,000.39 × 120,545.96
  4. Step 4: Simplify right side
    420,039.68x = 75,944,001,812.92
  5. Step 5: Solve for x
    x = 75,944,001,812.92/420,039.68
  6. Step 6: Final answer
    x = 180,801.97

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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.