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Finding the Fourth Proportional to 76,215.60, 113,999.40 and 68,374.80

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Solution

The fourth proportional to 76,215.60, 113,999.40 and 68,374.80 is: 102,271.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,215.60 : 113,999.40 = 68,374.80 : x
  2. Step 2: Convert to fraction form
    76,215.60/113,999.40 = 68,374.80/x
  3. Step 3: Cross multiply
    76,215.60x = 113,999.40 × 68,374.80
  4. Step 4: Simplify right side
    76,215.60x = 7,794,686,175.12
  5. Step 5: Solve for x
    x = 7,794,686,175.12/76,215.60
  6. Step 6: Final answer
    x = 102,271.53

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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.