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Finding the Fourth Proportional to 128,256.67, 176,993.65 and 71,668.04

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Solution

The fourth proportional to 128,256.67, 176,993.65 and 71,668.04 is: 98,901.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,256.67 : 176,993.65 = 71,668.04 : x
  2. Step 2: Convert to fraction form
    128,256.67/176,993.65 = 71,668.04/x
  3. Step 3: Cross multiply
    128,256.67x = 176,993.65 × 71,668.04
  4. Step 4: Simplify right side
    128,256.67x = 12,684,787,987.95
  5. Step 5: Solve for x
    x = 12,684,787,987.95/128,256.67
  6. Step 6: Final answer
    x = 98,901.59

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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.