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Finding the Fourth Proportional to 115,920.40, 173,621.40 and 89,539.60

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Solution

The fourth proportional to 115,920.40, 173,621.40 and 89,539.60 is: 134,109.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.40 : 173,621.40 = 89,539.60 : x
  2. Step 2: Convert to fraction form
    115,920.40/173,621.40 = 89,539.60/x
  3. Step 3: Cross multiply
    115,920.40x = 173,621.40 × 89,539.60
  4. Step 4: Simplify right side
    115,920.40x = 15,545,990,707.44
  5. Step 5: Solve for x
    x = 15,545,990,707.44/115,920.40
  6. Step 6: Final answer
    x = 134,109.19

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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.