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Finding the Fourth Proportional to 76,999.60, 115,572.30 and 65,918.80

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Solution

The fourth proportional to 76,999.60, 115,572.30 and 65,918.80 is: 98,940.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,999.60 : 115,572.30 = 65,918.80 : x
  2. Step 2: Convert to fraction form
    76,999.60/115,572.30 = 65,918.80/x
  3. Step 3: Cross multiply
    76,999.60x = 115,572.30 × 65,918.80
  4. Step 4: Simplify right side
    76,999.60x = 7,618,387,329.24
  5. Step 5: Solve for x
    x = 7,618,387,329.24/76,999.60
  6. Step 6: Final answer
    x = 98,940.61

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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.