Home / 420,518.75-630,874.73-121,001.81

Finding the Fourth Proportional to 420,518.75, 630,874.73 and 121,001.81

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Solution

The fourth proportional to 420,518.75, 630,874.73 and 121,001.81 is: 181,530.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,518.75 : 630,874.73 = 121,001.81 : x
  2. Step 2: Convert to fraction form
    420,518.75/630,874.73 = 121,001.81/x
  3. Step 3: Cross multiply
    420,518.75x = 630,874.73 × 121,001.81
  4. Step 4: Simplify right side
    420,518.75x = 76,336,981,361.39
  5. Step 5: Solve for x
    x = 76,336,981,361.39/420,518.75
  6. Step 6: Final answer
    x = 181,530.51

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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.