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Finding the Fourth Proportional to 115,430.80, 173,286.60 and 73,310.80

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Solution

The fourth proportional to 115,430.80, 173,286.60 and 73,310.80 is: 110,055.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,430.80 : 173,286.60 = 73,310.80 : x
  2. Step 2: Convert to fraction form
    115,430.80/173,286.60 = 73,310.80/x
  3. Step 3: Cross multiply
    115,430.80x = 173,286.60 × 73,310.80
  4. Step 4: Simplify right side
    115,430.80x = 12,703,779,275.28
  5. Step 5: Solve for x
    x = 12,703,779,275.28/115,430.80
  6. Step 6: Final answer
    x = 110,055.37

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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.