Home / 129,938.56-179,284.80-76,220.80

Finding the Fourth Proportional to 129,938.56, 179,284.80 and 76,220.80

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Solution

The fourth proportional to 129,938.56, 179,284.80 and 76,220.80 is: 105,166.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,938.56 : 179,284.80 = 76,220.80 : x
  2. Step 2: Convert to fraction form
    129,938.56/179,284.80 = 76,220.80/x
  3. Step 3: Cross multiply
    129,938.56x = 179,284.80 × 76,220.80
  4. Step 4: Simplify right side
    129,938.56x = 13,665,230,883.84
  5. Step 5: Solve for x
    x = 13,665,230,883.84/129,938.56
  6. Step 6: Final answer
    x = 105,166.86

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1.5x scale

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.