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Finding the Fourth Proportional to 99,986.40, 149,996.40 and 29,872.80

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Solution

The fourth proportional to 99,986.40, 149,996.40 and 29,872.80 is: 44,814.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,986.40 : 149,996.40 = 29,872.80 : x
  2. Step 2: Convert to fraction form
    99,986.40/149,996.40 = 29,872.80/x
  3. Step 3: Cross multiply
    99,986.40x = 149,996.40 × 29,872.80
  4. Step 4: Simplify right side
    99,986.40x = 4,480,812,457.92
  5. Step 5: Solve for x
    x = 4,480,812,457.92/99,986.40
  6. Step 6: Final answer
    x = 44,814.22

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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.