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Finding the Fourth Proportional to 85,687.47, 118,212.06 and 51,676.62

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Solution

The fourth proportional to 85,687.47, 118,212.06 and 51,676.62 is: 71,291.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,687.47 : 118,212.06 = 51,676.62 : x
  2. Step 2: Convert to fraction form
    85,687.47/118,212.06 = 51,676.62/x
  3. Step 3: Cross multiply
    85,687.47x = 118,212.06 × 51,676.62
  4. Step 4: Simplify right side
    85,687.47x = 6,108,799,454.53
  5. Step 5: Solve for x
    x = 6,108,799,454.53/85,687.47
  6. Step 6: Final answer
    x = 71,291.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.