Home / 128,541.68-177,202.66-90,182.39

Finding the Fourth Proportional to 128,541.68, 177,202.66 and 90,182.39

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Solution

The fourth proportional to 128,541.68, 177,202.66 and 90,182.39 is: 124,322.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,541.68 : 177,202.66 = 90,182.39 : x
  2. Step 2: Convert to fraction form
    128,541.68/177,202.66 = 90,182.39/x
  3. Step 3: Cross multiply
    128,541.68x = 177,202.66 × 90,182.39
  4. Step 4: Simplify right side
    128,541.68x = 15,980,559,202.80
  5. Step 5: Solve for x
    x = 15,980,559,202.80/128,541.68
  6. Step 6: Final answer
    x = 124,322.00

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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.