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Finding the Fourth Proportional to 165,432.40, 248,148.60 and 128,107.60

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Solution

The fourth proportional to 165,432.40, 248,148.60 and 128,107.60 is: 192,161.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,432.40 : 248,148.60 = 128,107.60 : x
  2. Step 2: Convert to fraction form
    165,432.40/248,148.60 = 128,107.60/x
  3. Step 3: Cross multiply
    165,432.40x = 248,148.60 × 128,107.60
  4. Step 4: Simplify right side
    165,432.40x = 31,789,721,589.36
  5. Step 5: Solve for x
    x = 31,789,721,589.36/165,432.40
  6. Step 6: Final answer
    x = 192,161.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.