Home / 138,736.40-208,066.20-55,638.80

Finding the Fourth Proportional to 138,736.40, 208,066.20 and 55,638.80

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Solution

The fourth proportional to 138,736.40, 208,066.20 and 55,638.80 is: 83,442.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,736.40 : 208,066.20 = 55,638.80 : x
  2. Step 2: Convert to fraction form
    138,736.40/208,066.20 = 55,638.80/x
  3. Step 3: Cross multiply
    138,736.40x = 208,066.20 × 55,638.80
  4. Step 4: Simplify right side
    138,736.40x = 11,576,553,688.56
  5. Step 5: Solve for x
    x = 11,576,553,688.56/138,736.40
  6. Step 6: Final answer
    x = 83,442.80

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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.