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Finding the Fourth Proportional to 101,489.79, 140,021.76 and 59,013.39

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Solution

The fourth proportional to 101,489.79, 140,021.76 and 59,013.39 is: 81,418.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,489.79 : 140,021.76 = 59,013.39 : x
  2. Step 2: Convert to fraction form
    101,489.79/140,021.76 = 59,013.39/x
  3. Step 3: Cross multiply
    101,489.79x = 140,021.76 × 59,013.39
  4. Step 4: Simplify right side
    101,489.79x = 8,263,158,731.37
  5. Step 5: Solve for x
    x = 8,263,158,731.37/101,489.79
  6. Step 6: Final answer
    x = 81,418.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.