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Finding the Fourth Proportional to 115,920.40, 173,837.40 and 80,755.60

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Solution

The fourth proportional to 115,920.40, 173,837.40 and 80,755.60 is: 121,103.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.40 : 173,837.40 = 80,755.60 : x
  2. Step 2: Convert to fraction form
    115,920.40/173,837.40 = 80,755.60/x
  3. Step 3: Cross multiply
    115,920.40x = 173,837.40 × 80,755.60
  4. Step 4: Simplify right side
    115,920.40x = 14,038,343,539.44
  5. Step 5: Solve for x
    x = 14,038,343,539.44/115,920.40
  6. Step 6: Final answer
    x = 121,103.30

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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.