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Finding the Fourth Proportional to 76,611.40, 115,010.70 and 43,354.60

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Solution

The fourth proportional to 76,611.40, 115,010.70 and 43,354.60 is: 65,084.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,611.40 : 115,010.70 = 43,354.60 : x
  2. Step 2: Convert to fraction form
    76,611.40/115,010.70 = 43,354.60/x
  3. Step 3: Cross multiply
    76,611.40x = 115,010.70 × 43,354.60
  4. Step 4: Simplify right side
    76,611.40x = 4,986,242,894.22
  5. Step 5: Solve for x
    x = 4,986,242,894.22/76,611.40
  6. Step 6: Final answer
    x = 65,084.87

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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.