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Finding the Fourth Proportional to 73,080.80, 109,603.92 and 31,505.12

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Solution

The fourth proportional to 73,080.80, 109,603.92 and 31,505.12 is: 47,250.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,080.80 : 109,603.92 = 31,505.12 : x
  2. Step 2: Convert to fraction form
    73,080.80/109,603.92 = 31,505.12/x
  3. Step 3: Cross multiply
    73,080.80x = 109,603.92 × 31,505.12
  4. Step 4: Simplify right side
    73,080.80x = 3,453,084,652.07
  5. Step 5: Solve for x
    x = 3,453,084,652.07/73,080.80
  6. Step 6: Final answer
    x = 47,250.23

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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.