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Finding the Fourth Proportional to 75,623.70, 112,659.50 and 72,211.98

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Solution

The fourth proportional to 75,623.70, 112,659.50 and 72,211.98 is: 107,576.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,623.70 : 112,659.50 = 72,211.98 : x
  2. Step 2: Convert to fraction form
    75,623.70/112,659.50 = 72,211.98/x
  3. Step 3: Cross multiply
    75,623.70x = 112,659.50 × 72,211.98
  4. Step 4: Simplify right side
    75,623.70x = 8,135,365,199.75
  5. Step 5: Solve for x
    x = 8,135,365,199.75/75,623.70
  6. Step 6: Final answer
    x = 107,576.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.