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Finding the Fourth Proportional to 72,042.88, 108,064.32 and 30,490.24

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Solution

The fourth proportional to 72,042.88, 108,064.32 and 30,490.24 is: 45,735.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,042.88 : 108,064.32 = 30,490.24 : x
  2. Step 2: Convert to fraction form
    72,042.88/108,064.32 = 30,490.24/x
  3. Step 3: Cross multiply
    72,042.88x = 108,064.32 × 30,490.24
  4. Step 4: Simplify right side
    72,042.88x = 3,294,907,052.24
  5. Step 5: Solve for x
    x = 3,294,907,052.24/72,042.88
  6. Step 6: Final answer
    x = 45,735.36

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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.