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Finding the Fourth Proportional to 78,350.80, 117,576.60 and 43,315.60

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Solution

The fourth proportional to 78,350.80, 117,576.60 and 43,315.60 is: 65,001.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,350.80 : 117,576.60 = 43,315.60 : x
  2. Step 2: Convert to fraction form
    78,350.80/117,576.60 = 43,315.60/x
  3. Step 3: Cross multiply
    78,350.80x = 117,576.60 × 43,315.60
  4. Step 4: Simplify right side
    78,350.80x = 5,092,900,974.96
  5. Step 5: Solve for x
    x = 5,092,900,974.96/78,350.80
  6. Step 6: Final answer
    x = 65,001.26

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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.