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Finding the Fourth Proportional to 120,013.52, 165,628.56 and 69,042.80

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Solution

The fourth proportional to 120,013.52, 165,628.56 and 69,042.80 is: 95,284.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,013.52 : 165,628.56 = 69,042.80 : x
  2. Step 2: Convert to fraction form
    120,013.52/165,628.56 = 69,042.80/x
  3. Step 3: Cross multiply
    120,013.52x = 165,628.56 × 69,042.80
  4. Step 4: Simplify right side
    120,013.52x = 11,435,459,542.37
  5. Step 5: Solve for x
    x = 11,435,459,542.37/120,013.52
  6. Step 6: Final answer
    x = 95,284.76

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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.