Home / 87,736.06-121,010.81-55,915.21

Finding the Fourth Proportional to 87,736.06, 121,010.81 and 55,915.21

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Solution

The fourth proportional to 87,736.06, 121,010.81 and 55,915.21 is: 77,121.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,736.06 : 121,010.81 = 55,915.21 : x
  2. Step 2: Convert to fraction form
    87,736.06/121,010.81 = 55,915.21/x
  3. Step 3: Cross multiply
    87,736.06x = 121,010.81 × 55,915.21
  4. Step 4: Simplify right side
    87,736.06x = 6,766,345,039.63
  5. Step 5: Solve for x
    x = 6,766,345,039.63/87,736.06
  6. Step 6: Final answer
    x = 77,121.60

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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.