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Finding the Fourth Proportional to 129,139.74, 193,720.77 and 35,645.49

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Solution

The fourth proportional to 129,139.74, 193,720.77 and 35,645.49 is: 53,471.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,139.74 : 193,720.77 = 35,645.49 : x
  2. Step 2: Convert to fraction form
    129,139.74/193,720.77 = 35,645.49/x
  3. Step 3: Cross multiply
    129,139.74x = 193,720.77 × 35,645.49
  4. Step 4: Simplify right side
    129,139.74x = 6,905,271,769.83
  5. Step 5: Solve for x
    x = 6,905,271,769.83/129,139.74
  6. Step 6: Final answer
    x = 53,471.32

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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.