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Finding the Fourth Proportional to 72,144.56, 108,222.28 and 21,539.58

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Solution

The fourth proportional to 72,144.56, 108,222.28 and 21,539.58 is: 32,310.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.56 : 108,222.28 = 21,539.58 : x
  2. Step 2: Convert to fraction form
    72,144.56/108,222.28 = 21,539.58/x
  3. Step 3: Cross multiply
    72,144.56x = 108,222.28 × 21,539.58
  4. Step 4: Simplify right side
    72,144.56x = 2,331,062,457.84
  5. Step 5: Solve for x
    x = 2,331,062,457.84/72,144.56
  6. Step 6: Final answer
    x = 32,310.99

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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.