Home / 128,021.40-176,668.78-71,432.60

Finding the Fourth Proportional to 128,021.40, 176,668.78 and 71,432.60

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Solution

The fourth proportional to 128,021.40, 176,668.78 and 71,432.60 is: 98,576.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,021.40 : 176,668.78 = 71,432.60 : x
  2. Step 2: Convert to fraction form
    128,021.40/176,668.78 = 71,432.60/x
  3. Step 3: Cross multiply
    128,021.40x = 176,668.78 × 71,432.60
  4. Step 4: Simplify right side
    128,021.40x = 12,619,910,294.23
  5. Step 5: Solve for x
    x = 12,619,910,294.23/128,021.40
  6. Step 6: Final answer
    x = 98,576.57

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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.