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Finding the Fourth Proportional to 72,144.16, 108,216.24 and 19,553.64

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Solution

The fourth proportional to 72,144.16, 108,216.24 and 19,553.64 is: 29,330.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.16 : 108,216.24 = 19,553.64 : x
  2. Step 2: Convert to fraction form
    72,144.16/108,216.24 = 19,553.64/x
  3. Step 3: Cross multiply
    72,144.16x = 108,216.24 × 19,553.64
  4. Step 4: Simplify right side
    72,144.16x = 2,116,021,301.35
  5. Step 5: Solve for x
    x = 2,116,021,301.35/72,144.16
  6. Step 6: Final answer
    x = 29,330.46

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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.