Home / 138,921.88-208,244.40-54,629.32

Finding the Fourth Proportional to 138,921.88, 208,244.40 and 54,629.32

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Solution

The fourth proportional to 138,921.88, 208,244.40 and 54,629.32 is: 81,889.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,921.88 : 208,244.40 = 54,629.32 : x
  2. Step 2: Convert to fraction form
    138,921.88/208,244.40 = 54,629.32/x
  3. Step 3: Cross multiply
    138,921.88x = 208,244.40 × 54,629.32
  4. Step 4: Simplify right side
    138,921.88x = 11,376,249,965.81
  5. Step 5: Solve for x
    x = 11,376,249,965.81/138,921.88
  6. Step 6: Final answer
    x = 81,889.55

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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.