Home / 131,120.29-180,918.88-76,661.97

Finding the Fourth Proportional to 131,120.29, 180,918.88 and 76,661.97

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Solution

The fourth proportional to 131,120.29, 180,918.88 and 76,661.97 is: 105,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,120.29 : 180,918.88 = 76,661.97 : x
  2. Step 2: Convert to fraction form
    131,120.29/180,918.88 = 76,661.97/x
  3. Step 3: Cross multiply
    131,120.29x = 180,918.88 × 76,661.97
  4. Step 4: Simplify right side
    131,120.29x = 13,869,597,750.99
  5. Step 5: Solve for x
    x = 13,869,597,750.99/131,120.29
  6. Step 6: Final answer
    x = 105,777.66

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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.