Home / 128,606.16-177,287.22-90,244.56

Finding the Fourth Proportional to 128,606.16, 177,287.22 and 90,244.56

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Solution

The fourth proportional to 128,606.16, 177,287.22 and 90,244.56 is: 124,404.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,606.16 : 177,287.22 = 90,244.56 : x
  2. Step 2: Convert to fraction form
    128,606.16/177,287.22 = 90,244.56/x
  3. Step 3: Cross multiply
    128,606.16x = 177,287.22 × 90,244.56
  4. Step 4: Simplify right side
    128,606.16x = 15,999,207,162.52
  5. Step 5: Solve for x
    x = 15,999,207,162.52/128,606.16
  6. Step 6: Final answer
    x = 124,404.67

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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.