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Finding the Fourth Proportional to 115,915.40, 173,829.90 and 80,750.60

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Solution

The fourth proportional to 115,915.40, 173,829.90 and 80,750.60 is: 121,095.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,915.40 : 173,829.90 = 80,750.60 : x
  2. Step 2: Convert to fraction form
    115,915.40/173,829.90 = 80,750.60/x
  3. Step 3: Cross multiply
    115,915.40x = 173,829.90 × 80,750.60
  4. Step 4: Simplify right side
    115,915.40x = 14,036,868,722.94
  5. Step 5: Solve for x
    x = 14,036,868,722.94/115,915.40
  6. Step 6: Final answer
    x = 121,095.81

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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.