Home / 135,629.10-187,139.43-81,903.69

Finding the Fourth Proportional to 135,629.10, 187,139.43 and 81,903.69

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Solution

The fourth proportional to 135,629.10, 187,139.43 and 81,903.69 is: 113,009.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,629.10 : 187,139.43 = 81,903.69 : x
  2. Step 2: Convert to fraction form
    135,629.10/187,139.43 = 81,903.69/x
  3. Step 3: Cross multiply
    135,629.10x = 187,139.43 × 81,903.69
  4. Step 4: Simplify right side
    135,629.10x = 15,327,409,861.50
  5. Step 5: Solve for x
    x = 15,327,409,861.50/135,629.10
  6. Step 6: Final answer
    x = 113,009.74

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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.