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Finding the Fourth Proportional to 128,066.91, 176,716.04 and 71,480.67

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Solution

The fourth proportional to 128,066.91, 176,716.04 and 71,480.67 is: 98,634.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,066.91 : 176,716.04 = 71,480.67 : x
  2. Step 2: Convert to fraction form
    128,066.91/176,716.04 = 71,480.67/x
  3. Step 3: Cross multiply
    128,066.91x = 176,716.04 × 71,480.67
  4. Step 4: Simplify right side
    128,066.91x = 12,631,780,581.54
  5. Step 5: Solve for x
    x = 12,631,780,581.54/128,066.91
  6. Step 6: Final answer
    x = 98,634.23

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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.