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Finding the Fourth Proportional to 78,689.70, 118,077.78 and 37,135.62

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Solution

The fourth proportional to 78,689.70, 118,077.78 and 37,135.62 is: 55,723.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,689.70 : 118,077.78 = 37,135.62 : x
  2. Step 2: Convert to fraction form
    78,689.70/118,077.78 = 37,135.62/x
  3. Step 3: Cross multiply
    78,689.70x = 118,077.78 × 37,135.62
  4. Step 4: Simplify right side
    78,689.70x = 4,384,891,568.52
  5. Step 5: Solve for x
    x = 4,384,891,568.52/78,689.70
  6. Step 6: Final answer
    x = 55,723.83

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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.