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Finding the Fourth Proportional to 76,751.60, 115,019.40 and 60,983.60

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Solution

The fourth proportional to 76,751.60, 115,019.40 and 60,983.60 is: 91,389.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,751.60 : 115,019.40 = 60,983.60 : x
  2. Step 2: Convert to fraction form
    76,751.60/115,019.40 = 60,983.60/x
  3. Step 3: Cross multiply
    76,751.60x = 115,019.40 × 60,983.60
  4. Step 4: Simplify right side
    76,751.60x = 7,014,297,081.84
  5. Step 5: Solve for x
    x = 7,014,297,081.84/76,751.60
  6. Step 6: Final answer
    x = 91,389.59

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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.