Home / 128,210.09-176,930.39-71,622.41

Finding the Fourth Proportional to 128,210.09, 176,930.39 and 71,622.41

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Solution

The fourth proportional to 128,210.09, 176,930.39 and 71,622.41 is: 98,839.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,210.09 : 176,930.39 = 71,622.41 : x
  2. Step 2: Convert to fraction form
    128,210.09/176,930.39 = 71,622.41/x
  3. Step 3: Cross multiply
    128,210.09x = 176,930.39 × 71,622.41
  4. Step 4: Simplify right side
    128,210.09x = 12,672,180,228.44
  5. Step 5: Solve for x
    x = 12,672,180,228.44/128,210.09
  6. Step 6: Final answer
    x = 98,839.18

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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.