Home / 129,561.48-194,039.82-99,742.68

Finding the Fourth Proportional to 129,561.48, 194,039.82 and 99,742.68

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Solution

The fourth proportional to 129,561.48, 194,039.82 and 99,742.68 is: 149,381.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,561.48 : 194,039.82 = 99,742.68 : x
  2. Step 2: Convert to fraction form
    129,561.48/194,039.82 = 99,742.68/x
  3. Step 3: Cross multiply
    129,561.48x = 194,039.82 × 99,742.68
  4. Step 4: Simplify right side
    129,561.48x = 19,354,051,673.52
  5. Step 5: Solve for x
    x = 19,354,051,673.52/129,561.48
  6. Step 6: Final answer
    x = 149,381.22

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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.