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Finding the Fourth Proportional to 159,139.28, 239,656.46 and 138,610.64

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Solution

The fourth proportional to 159,139.28, 239,656.46 and 138,610.64 is: 208,741.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,139.28 : 239,656.46 = 138,610.64 : x
  2. Step 2: Convert to fraction form
    159,139.28/239,656.46 = 138,610.64/x
  3. Step 3: Cross multiply
    159,139.28x = 239,656.46 × 138,610.64
  4. Step 4: Simplify right side
    159,139.28x = 33,218,935,300.73
  5. Step 5: Solve for x
    x = 33,218,935,300.73/159,139.28
  6. Step 6: Final answer
    x = 208,741.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.