Home / 75,434.32-113,136.90-71,687.80

Finding the Fourth Proportional to 75,434.32, 113,136.90 and 71,687.80

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Solution

The fourth proportional to 75,434.32, 113,136.90 and 71,687.80 is: 107,517.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,434.32 : 113,136.90 = 71,687.80 : x
  2. Step 2: Convert to fraction form
    75,434.32/113,136.90 = 71,687.80/x
  3. Step 3: Cross multiply
    75,434.32x = 113,136.90 × 71,687.80
  4. Step 4: Simplify right side
    75,434.32x = 8,110,535,459.82
  5. Step 5: Solve for x
    x = 8,110,535,459.82/75,434.32
  6. Step 6: Final answer
    x = 107,517.84

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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.