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Finding the Fourth Proportional to 316,657.33, 474,986.90 and 76,770.29

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Solution

The fourth proportional to 316,657.33, 474,986.90 and 76,770.29 is: 115,155.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,657.33 : 474,986.90 = 76,770.29 : x
  2. Step 2: Convert to fraction form
    316,657.33/474,986.90 = 76,770.29/x
  3. Step 3: Cross multiply
    316,657.33x = 474,986.90 × 76,770.29
  4. Step 4: Simplify right side
    316,657.33x = 36,464,883,438.59
  5. Step 5: Solve for x
    x = 36,464,883,438.59/316,657.33
  6. Step 6: Final answer
    x = 115,155.66

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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.