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Finding the Fourth Proportional to 128,689.18, 193,059.59 and 44,452.42

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Solution

The fourth proportional to 128,689.18, 193,059.59 and 44,452.42 is: 66,687.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,689.18 : 193,059.59 = 44,452.42 : x
  2. Step 2: Convert to fraction form
    128,689.18/193,059.59 = 44,452.42/x
  3. Step 3: Cross multiply
    128,689.18x = 193,059.59 × 44,452.42
  4. Step 4: Simplify right side
    128,689.18x = 8,581,965,274.80
  5. Step 5: Solve for x
    x = 8,581,965,274.80/128,689.18
  6. Step 6: Final answer
    x = 66,687.54

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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.