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Finding the Fourth Proportional to 316,945.44, 475,414.56 and 77,060.70

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Solution

The fourth proportional to 316,945.44, 475,414.56 and 77,060.70 is: 115,590.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,945.44 : 475,414.56 = 77,060.70 : x
  2. Step 2: Convert to fraction form
    316,945.44/475,414.56 = 77,060.70/x
  3. Step 3: Cross multiply
    316,945.44x = 475,414.56 × 77,060.70
  4. Step 4: Simplify right side
    316,945.44x = 36,635,778,783.79
  5. Step 5: Solve for x
    x = 36,635,778,783.79/316,945.44
  6. Step 6: Final answer
    x = 115,590.17

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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.