Home / 78,747.40-118,121.10-41,422.60

Finding the Fourth Proportional to 78,747.40, 118,121.10 and 41,422.60

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Solution

The fourth proportional to 78,747.40, 118,121.10 and 41,422.60 is: 62,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,747.40 : 118,121.10 = 41,422.60 : x
  2. Step 2: Convert to fraction form
    78,747.40/118,121.10 = 41,422.60/x
  3. Step 3: Cross multiply
    78,747.40x = 118,121.10 × 41,422.60
  4. Step 4: Simplify right side
    78,747.40x = 4,892,883,076.86
  5. Step 5: Solve for x
    x = 4,892,883,076.86/78,747.40
  6. Step 6: Final answer
    x = 62,133.90

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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.