Home / 189,682.89-261,884.43-121,729.16

Finding the Fourth Proportional to 189,682.89, 261,884.43 and 121,729.16

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Solution

The fourth proportional to 189,682.89, 261,884.43 and 121,729.16 is: 168,064.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,682.89 : 261,884.43 = 121,729.16 : x
  2. Step 2: Convert to fraction form
    189,682.89/261,884.43 = 121,729.16/x
  3. Step 3: Cross multiply
    189,682.89x = 261,884.43 × 121,729.16
  4. Step 4: Simplify right side
    189,682.89x = 31,878,971,680.98
  5. Step 5: Solve for x
    x = 31,878,971,680.98/189,682.89
  6. Step 6: Final answer
    x = 168,064.56

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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.