Home / 128,021.05-176,668.90-71,432.43

Finding the Fourth Proportional to 128,021.05, 176,668.90 and 71,432.43

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Solution

The fourth proportional to 128,021.05, 176,668.90 and 71,432.43 is: 98,576.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,021.05 : 176,668.90 = 71,432.43 : x
  2. Step 2: Convert to fraction form
    128,021.05/176,668.90 = 71,432.43/x
  3. Step 3: Cross multiply
    128,021.05x = 176,668.90 × 71,432.43
  4. Step 4: Simplify right side
    128,021.05x = 12,619,888,832.43
  5. Step 5: Solve for x
    x = 12,619,888,832.43/128,021.05
  6. Step 6: Final answer
    x = 98,576.67

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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.