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Finding the Fourth Proportional to 99,991.66, 150,061.18 and 47,400.94

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Solution

The fourth proportional to 99,991.66, 150,061.18 and 47,400.94 is: 71,136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,991.66 : 150,061.18 = 47,400.94 : x
  2. Step 2: Convert to fraction form
    99,991.66/150,061.18 = 47,400.94/x
  3. Step 3: Cross multiply
    99,991.66x = 150,061.18 × 47,400.94
  4. Step 4: Simplify right side
    99,991.66x = 7,113,040,989.51
  5. Step 5: Solve for x
    x = 7,113,040,989.51/99,991.66
  6. Step 6: Final answer
    x = 71,136.34

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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.