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Finding the Fourth Proportional to 76,878.60, 115,404.30 and 59,425.80

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Solution

The fourth proportional to 76,878.60, 115,404.30 and 59,425.80 is: 89,205.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,878.60 : 115,404.30 = 59,425.80 : x
  2. Step 2: Convert to fraction form
    76,878.60/115,404.30 = 59,425.80/x
  3. Step 3: Cross multiply
    76,878.60x = 115,404.30 × 59,425.80
  4. Step 4: Simplify right side
    76,878.60x = 6,857,992,850.94
  5. Step 5: Solve for x
    x = 6,857,992,850.94/76,878.60
  6. Step 6: Final answer
    x = 89,205.49

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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.