Home / 82,664.40-123,996.60-57,781.20

Finding the Fourth Proportional to 82,664.40, 123,996.60 and 57,781.20

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Solution

The fourth proportional to 82,664.40, 123,996.60 and 57,781.20 is: 86,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,664.40 : 123,996.60 = 57,781.20 : x
  2. Step 2: Convert to fraction form
    82,664.40/123,996.60 = 57,781.20/x
  3. Step 3: Cross multiply
    82,664.40x = 123,996.60 × 57,781.20
  4. Step 4: Simplify right side
    82,664.40x = 7,164,672,343.92
  5. Step 5: Solve for x
    x = 7,164,672,343.92/82,664.40
  6. Step 6: Final answer
    x = 86,671.80

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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.