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Finding the Fourth Proportional to 129,653.80, 194,403.90 and 67,445.80

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Solution

The fourth proportional to 129,653.80, 194,403.90 and 67,445.80 is: 101,128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,653.80 : 194,403.90 = 67,445.80 : x
  2. Step 2: Convert to fraction form
    129,653.80/194,403.90 = 67,445.80/x
  3. Step 3: Cross multiply
    129,653.80x = 194,403.90 × 67,445.80
  4. Step 4: Simplify right side
    129,653.80x = 13,111,726,558.62
  5. Step 5: Solve for x
    x = 13,111,726,558.62/129,653.80
  6. Step 6: Final answer
    x = 101,128.75

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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.