Home / 420,470.43-630,768.06-136,065.66

Finding the Fourth Proportional to 420,470.43, 630,768.06 and 136,065.66

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Solution

The fourth proportional to 420,470.43, 630,768.06 and 136,065.66 is: 204,118.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,470.43 : 630,768.06 = 136,065.66 : x
  2. Step 2: Convert to fraction form
    420,470.43/630,768.06 = 136,065.66/x
  3. Step 3: Cross multiply
    420,470.43x = 630,768.06 × 136,065.66
  4. Step 4: Simplify right side
    420,470.43x = 85,825,872,390.82
  5. Step 5: Solve for x
    x = 85,825,872,390.82/420,470.43
  6. Step 6: Final answer
    x = 204,118.69

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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.