Home / 128,546.98-177,222.09-90,255.22

Finding the Fourth Proportional to 128,546.98, 177,222.09 and 90,255.22

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Solution

The fourth proportional to 128,546.98, 177,222.09 and 90,255.22 is: 124,430.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,546.98 : 177,222.09 = 90,255.22 : x
  2. Step 2: Convert to fraction form
    128,546.98/177,222.09 = 90,255.22/x
  3. Step 3: Cross multiply
    128,546.98x = 177,222.09 × 90,255.22
  4. Step 4: Simplify right side
    128,546.98x = 15,995,218,721.81
  5. Step 5: Solve for x
    x = 15,995,218,721.81/128,546.98
  6. Step 6: Final answer
    x = 124,430.92

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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.