Home / 91,103.68-136,716.96-31,939.84

Finding the Fourth Proportional to 91,103.68, 136,716.96 and 31,939.84

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Solution

The fourth proportional to 91,103.68, 136,716.96 and 31,939.84 is: 47,931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,103.68 : 136,716.96 = 31,939.84 : x
  2. Step 2: Convert to fraction form
    91,103.68/136,716.96 = 31,939.84/x
  3. Step 3: Cross multiply
    91,103.68x = 136,716.96 × 31,939.84
  4. Step 4: Simplify right side
    91,103.68x = 4,366,717,827.69
  5. Step 5: Solve for x
    x = 4,366,717,827.69/91,103.68
  6. Step 6: Final answer
    x = 47,931.30

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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.