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Finding the Fourth Proportional to 316,709.84, 475,081.05 and 80,054.54

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Solution

The fourth proportional to 316,709.84, 475,081.05 and 80,054.54 is: 120,085.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,709.84 : 475,081.05 = 80,054.54 : x
  2. Step 2: Convert to fraction form
    316,709.84/475,081.05 = 80,054.54/x
  3. Step 3: Cross multiply
    316,709.84x = 475,081.05 × 80,054.54
  4. Step 4: Simplify right side
    316,709.84x = 38,032,394,920.47
  5. Step 5: Solve for x
    x = 38,032,394,920.47/316,709.84
  6. Step 6: Final answer
    x = 120,085.93

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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.