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Finding the Fourth Proportional to 72,299.50, 99,759.13 and 45,426.44

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Solution

The fourth proportional to 72,299.50, 99,759.13 and 45,426.44 is: 62,679.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,299.50 : 99,759.13 = 45,426.44 : x
  2. Step 2: Convert to fraction form
    72,299.50/99,759.13 = 45,426.44/x
  3. Step 3: Cross multiply
    72,299.50x = 99,759.13 × 45,426.44
  4. Step 4: Simplify right side
    72,299.50x = 4,531,702,133.40
  5. Step 5: Solve for x
    x = 4,531,702,133.40/72,299.50
  6. Step 6: Final answer
    x = 62,679.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.