Home / 91,212.68-136,840.28-31,241.80

Finding the Fourth Proportional to 91,212.68, 136,840.28 and 31,241.80

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Solution

The fourth proportional to 91,212.68, 136,840.28 and 31,241.80 is: 46,869.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,212.68 : 136,840.28 = 31,241.80 : x
  2. Step 2: Convert to fraction form
    91,212.68/136,840.28 = 31,241.80/x
  3. Step 3: Cross multiply
    91,212.68x = 136,840.28 × 31,241.80
  4. Step 4: Simplify right side
    91,212.68x = 4,275,135,819.29
  5. Step 5: Solve for x
    x = 4,275,135,819.29/91,212.68
  6. Step 6: Final answer
    x = 46,869.98

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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.