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Finding the Fourth Proportional to 163,378.40, 245,067.60 and 80,434.40

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Solution

The fourth proportional to 163,378.40, 245,067.60 and 80,434.40 is: 120,651.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,378.40 : 245,067.60 = 80,434.40 : x
  2. Step 2: Convert to fraction form
    163,378.40/245,067.60 = 80,434.40/x
  3. Step 3: Cross multiply
    163,378.40x = 245,067.60 × 80,434.40
  4. Step 4: Simplify right side
    163,378.40x = 19,711,865,365.44
  5. Step 5: Solve for x
    x = 19,711,865,365.44/163,378.40
  6. Step 6: Final answer
    x = 120,651.60

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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.