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Finding the Fourth Proportional to 67,378.69, 92,975.16 and 39,078.91

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Solution

The fourth proportional to 67,378.69, 92,975.16 and 39,078.91 is: 53,924.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,378.69 : 92,975.16 = 39,078.91 : x
  2. Step 2: Convert to fraction form
    67,378.69/92,975.16 = 39,078.91/x
  3. Step 3: Cross multiply
    67,378.69x = 92,975.16 × 39,078.91
  4. Step 4: Simplify right side
    67,378.69x = 3,633,367,909.88
  5. Step 5: Solve for x
    x = 3,633,367,909.88/67,378.69
  6. Step 6: Final answer
    x = 53,924.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.