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Finding the Fourth Proportional to 99,369.66, 149,018.42 and 54,424.40

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Solution

The fourth proportional to 99,369.66, 149,018.42 and 54,424.40 is: 81,616.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,369.66 : 149,018.42 = 54,424.40 : x
  2. Step 2: Convert to fraction form
    99,369.66/149,018.42 = 54,424.40/x
  3. Step 3: Cross multiply
    99,369.66x = 149,018.42 × 54,424.40
  4. Step 4: Simplify right side
    99,369.66x = 8,110,238,097.45
  5. Step 5: Solve for x
    x = 8,110,238,097.45/99,369.66
  6. Step 6: Final answer
    x = 81,616.84

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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.