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Finding the Fourth Proportional to 128,045.20, 192,067.80 and 65,059.60

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Solution

The fourth proportional to 128,045.20, 192,067.80 and 65,059.60 is: 97,589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.20 : 192,067.80 = 65,059.60 : x
  2. Step 2: Convert to fraction form
    128,045.20/192,067.80 = 65,059.60/x
  3. Step 3: Cross multiply
    128,045.20x = 192,067.80 × 65,059.60
  4. Step 4: Simplify right side
    128,045.20x = 12,495,854,240.88
  5. Step 5: Solve for x
    x = 12,495,854,240.88/128,045.20
  6. Step 6: Final answer
    x = 97,589.40

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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.