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Finding the Fourth Proportional to 99,349.70, 148,983.08 and 40,143.87

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Solution

The fourth proportional to 99,349.70, 148,983.08 and 40,143.87 is: 60,199.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,349.70 : 148,983.08 = 40,143.87 : x
  2. Step 2: Convert to fraction form
    99,349.70/148,983.08 = 40,143.87/x
  3. Step 3: Cross multiply
    99,349.70x = 148,983.08 × 40,143.87
  4. Step 4: Simplify right side
    99,349.70x = 5,980,757,195.00
  5. Step 5: Solve for x
    x = 5,980,757,195.00/99,349.70
  6. Step 6: Final answer
    x = 60,199.05

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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.