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Finding the Fourth Proportional to 316,908.91, 475,363.23 and 77,021.54

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Solution

The fourth proportional to 316,908.91, 475,363.23 and 77,021.54 is: 115,532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,908.91 : 475,363.23 = 77,021.54 : x
  2. Step 2: Convert to fraction form
    316,908.91/475,363.23 = 77,021.54/x
  3. Step 3: Cross multiply
    316,908.91x = 475,363.23 × 77,021.54
  4. Step 4: Simplify right side
    316,908.91x = 36,613,208,033.97
  5. Step 5: Solve for x
    x = 36,613,208,033.97/316,908.91
  6. Step 6: Final answer
    x = 115,532.28

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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.