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Finding the Fourth Proportional to 71,728.53, 99,006.21 and 47,855.15

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Solution

The fourth proportional to 71,728.53, 99,006.21 and 47,855.15 is: 66,054.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,728.53 : 99,006.21 = 47,855.15 : x
  2. Step 2: Convert to fraction form
    71,728.53/99,006.21 = 47,855.15/x
  3. Step 3: Cross multiply
    71,728.53x = 99,006.21 × 47,855.15
  4. Step 4: Simplify right side
    71,728.53x = 4,737,956,535.45
  5. Step 5: Solve for x
    x = 4,737,956,535.45/71,728.53
  6. Step 6: Final answer
    x = 66,054.00

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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.