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Finding the Fourth Proportional to 72,596.50, 99,872.13 and 69,486.10

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Solution

The fourth proportional to 72,596.50, 99,872.13 and 69,486.10 is: 95,593.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,596.50 : 99,872.13 = 69,486.10 : x
  2. Step 2: Convert to fraction form
    72,596.50/99,872.13 = 69,486.10/x
  3. Step 3: Cross multiply
    72,596.50x = 99,872.13 × 69,486.10
  4. Step 4: Simplify right side
    72,596.50x = 6,939,724,812.39
  5. Step 5: Solve for x
    x = 6,939,724,812.39/72,596.50
  6. Step 6: Final answer
    x = 95,593.10

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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.