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Finding the Fourth Proportional to 99,911.70, 149,794.65 and 40,716.90

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Solution

The fourth proportional to 99,911.70, 149,794.65 and 40,716.90 is: 61,045.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,911.70 : 149,794.65 = 40,716.90 : x
  2. Step 2: Convert to fraction form
    99,911.70/149,794.65 = 40,716.90/x
  3. Step 3: Cross multiply
    99,911.70x = 149,794.65 × 40,716.90
  4. Step 4: Simplify right side
    99,911.70x = 6,099,173,784.59
  5. Step 5: Solve for x
    x = 6,099,173,784.59/99,911.70
  6. Step 6: Final answer
    x = 61,045.64

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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.