Home / 128,674.26-177,570.36-72,086.04

Finding the Fourth Proportional to 128,674.26, 177,570.36 and 72,086.04

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Solution

The fourth proportional to 128,674.26, 177,570.36 and 72,086.04 is: 99,478.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,674.26 : 177,570.36 = 72,086.04 : x
  2. Step 2: Convert to fraction form
    128,674.26/177,570.36 = 72,086.04/x
  3. Step 3: Cross multiply
    128,674.26x = 177,570.36 × 72,086.04
  4. Step 4: Simplify right side
    128,674.26x = 12,800,344,073.77
  5. Step 5: Solve for x
    x = 12,800,344,073.77/128,674.26
  6. Step 6: Final answer
    x = 99,478.67

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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.