Home / 138,417.40-207,615.30-54,161.20

Finding the Fourth Proportional to 138,417.40, 207,615.30 and 54,161.20

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Solution

The fourth proportional to 138,417.40, 207,615.30 and 54,161.20 is: 81,237.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,417.40 : 207,615.30 = 54,161.20 : x
  2. Step 2: Convert to fraction form
    138,417.40/207,615.30 = 54,161.20/x
  3. Step 3: Cross multiply
    138,417.40x = 207,615.30 × 54,161.20
  4. Step 4: Simplify right side
    138,417.40x = 11,244,693,786.36
  5. Step 5: Solve for x
    x = 11,244,693,786.36/138,417.40
  6. Step 6: Final answer
    x = 81,237.57

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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.