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Finding the Fourth Proportional to 128,119.70, 176,791.77 and 74,394.24

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Solution

The fourth proportional to 128,119.70, 176,791.77 and 74,394.24 is: 102,656.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,119.70 : 176,791.77 = 74,394.24 : x
  2. Step 2: Convert to fraction form
    128,119.70/176,791.77 = 74,394.24/x
  3. Step 3: Cross multiply
    128,119.70x = 176,791.77 × 74,394.24
  4. Step 4: Simplify right side
    128,119.70x = 13,152,289,367.40
  5. Step 5: Solve for x
    x = 13,152,289,367.40/128,119.70
  6. Step 6: Final answer
    x = 102,656.27

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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.