Home / 128,244.09-177,039.09-90,084.72

Finding the Fourth Proportional to 128,244.09, 177,039.09 and 90,084.72

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Solution

The fourth proportional to 128,244.09, 177,039.09 and 90,084.72 is: 124,360.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,244.09 : 177,039.09 = 90,084.72 : x
  2. Step 2: Convert to fraction form
    128,244.09/177,039.09 = 90,084.72/x
  3. Step 3: Cross multiply
    128,244.09x = 177,039.09 × 90,084.72
  4. Step 4: Simplify right side
    128,244.09x = 15,948,516,851.70
  5. Step 5: Solve for x
    x = 15,948,516,851.70/128,244.09
  6. Step 6: Final answer
    x = 124,360.64

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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.